Lutheranism in the context of Psalm 10

An icon (from Ancient Greek εἰκών (eikṓn) 'image, resemblance') is a religious work of art, most commonly a painting, in the cultures of the Eastern Orthodox, Oriental Orthodox, Catholic, and Lutheran churches. The most common subjects include Jesus, Mary, saints, and angels. Although especially associated with portrait-style images concentrating on one or two main figures, the term also covers most of the religious images in a variety of artistic media produced by Eastern Christianity, including narrative scenes, usually from the Bible or the lives of saints.

Icons are most commonly painted on wood panels with egg tempera, but they may also be cast in metal or carved in stone or embroidered on cloth or done in mosaic or fresco work or printed on paper or metal, etc. Comparable images from Western Christianity may be classified as "icons", although "iconic" may also be used to describe the static style of a devotional image. In the Greek language, the term for icon painting uses the same word as for "writing", and Orthodox sources often translate it into English as icon writing.

In the history of Christianity, the first seven ecumenical councils are as follows: the First Council of Nicaea in 325, the First Council of Constantinople in 381, the Council of Ephesus in 431, the Council of Chalcedon in 451, the Second Council of Constantinople in 553, the Third Council of Constantinople from 680 to 681 and finally, the Second Council of Nicaea in 787.

These seven events represented an attempt by Church leaders to reach an orthodox consensus, restore peace and develop a unified Christendom. Among Eastern Christians the Eastern Orthodox, Oriental Orthodox, and Church of the East (Assyrian) churches and among Western Christians the Roman Catholic, Anglican, Utrecht and Polish National Old Catholic, and some Scandinavian Lutheran churches all trace the legitimacy of their clergy by apostolic succession back to this period and beyond, to the earlier period referred to as the Early Church.

The Four Marks of the Church, also known as the Attributes of the Church, describes four distinctive adjectives of traditional Christian ecclesiology as expressed in the Nicene Creed completed at the First Council of Constantinople in AD 381: "[We believe] in one, holy, catholic, and apostolic Church."

This ecumenical creed is today recited in the liturgies of the Eastern Orthodox Church, the Catholic Church (both Latin and Eastern Rites), the Oriental Orthodox Churches, the Assyrian Church of the East, the Moravian Church, the Lutheran Churches, the Methodist Churches, the Presbyterian Churches, the Anglican Communion, and by members of the Reformed Churches, although they interpret it in very different ways, and some Protestants alter the word "Catholic" in the creed, replacing it with the word "Christian".

Mary was a first-century Jewish woman of Nazareth, the wife of Joseph and the mother of Jesus. She is an important figure of Christianity, venerated under various titles such as virgin or queen, many of them mentioned in the Litany of Loreto. The Eastern and Oriental Orthodox, Catholic, Evangelical Lutheran, Reformed, Anglican, Methodist and Baptist churches believe that Mary, as mother of Jesus, is the Mother of God. The Church of the East historically regarded her as Christotokos, a term still used in Assyrian Church of the East liturgy. She has the highest position in Islam among all women and is mentioned numerous times in the Quran, including in a chapter named after her. She is also revered in the Baháʼí Faith and the Druze Faith.

The synoptic Gospels name Mary as the mother of Jesus. The gospels of Matthew and Luke describe Mary as a virgin who was chosen by God to conceive Jesus through the Holy Spirit. After giving birth to Jesus in Bethlehem, she and her husband Joseph raised him in the city of Nazareth in Galilee, and she was in Jerusalem at his crucifixion and with the apostles after his ascension. Although her later life is not accounted in the Bible; Catholic, Eastern Orthodox, and some Protestant traditions believe that her body was raised into heaven at the end of her earthly life, which is known in Western Christianity as the Assumption of Mary and in Eastern Christianity as the Dormition of the Mother of God.

Iceland is a Nordic island country between the Arctic Ocean and the North Atlantic Ocean, located on the Mid-Atlantic Ridge between Europe and North America. It is culturally and politically linked with Europe and is the region's westernmost and most sparsely populated country. Its capital and largest city is Reykjavík, which is home to about 36% of the country's roughly 390,000 residents (excluding nearby towns/suburbs, which are separate municipalities). The official language of the country is Icelandic. Iceland is on a rift between tectonic plates, and its geologic activity includes geysers and frequent volcanic eruptions. The interior consists of a volcanic plateau with sand and lava fields, mountains and glaciers, and many glacial rivers flow to the sea through the lowlands. Iceland is warmed by the Gulf Stream and has a temperate climate, despite being at a latitude just south of the Arctic Circle. Its latitude and marine influence keep summers chilly, and most of its islands have a polar climate.

According to the Landnámabók, an ancient manuscript, the settlement of Iceland began in 874 AD, when the Norwegian chieftain Ingólfr Arnarson became the island's first permanent settler. In following centuries, Norwegians and to a lesser extent other Scandinavians, immigrated to Iceland, bringing with them thralls (i.e., slaves or serfs) of Gaelic origin. The island was governed as an independent commonwealth under the native parliament, the Althing, one of the world's oldest functioning legislative assemblies. After a period of civil strife, Iceland acceded to Norwegian rule in the 13th century. In 1397, Iceland followed Norway's integration into the Kalmar Union along with the kingdoms of Denmark and Sweden, coming under de facto Danish rule upon its dissolution in 1523. The Danish kingdom introduced Lutheranism by force in 1550, and the Treaty of Kiel formally ceded Iceland to Denmark in 1814.

In Christian belief, a saint, also known as a hallow, is a person who is recognized as having an exceptional degree of holiness, likeness, or closeness to God. However, the use of the term saint depends on the context and denomination. Official ecclesiastical recognition, and veneration, is conferred on some denominational saints through the process of canonization in the Catholic Church or glorification in the Eastern Orthodox Church after their approval. The saints are honored in the liturgical calendars of Evangelical Lutheranism and Anglicanism. In other nonconformist denominations, such as the Plymouth Brethren, and following from Pauline usage, saint refers broadly to any holy Christian without special recognition or selection.

While the English word saint (deriving from the Latin sanctus) originated in Christianity, historians of religion tend to use the appellation "in a more general way to refer to the state of special holiness that many religions attribute to certain people", referring to the Hindu rishi, Sikh bhagat or guru, the Shintoist kami, the Taoist immortal or zhenren, the Jewish tzadik, the Islamic walī/fakir, and the Buddhist arhat or bodhisattva also as saints. Depending on the religion, saints are recognized either by official declaration, as in Roman Catholicism, Oriental Orthodoxy or Eastern Orthodoxy, or by popular acclamation (see folk saint).

A coronation ceremony marks the formal investiture of a monarch with regal power using a crown. In addition to the crowning, this ceremony may include the presentation of other items of regalia, and other rituals such as the taking of special vows by the new monarch, the investing and presentation of regalia to them, and acts of homage by the new monarch's subjects. In certain Christian denominations, such as Lutheranism and Anglicanism, coronation is a religious rite. As such, Western-style coronations have often included anointing the monarch with holy oil, or chrism as it is often called; the anointing ritual's religious significance follows examples found in the Bible. The monarch's consort may also be crowned, either simultaneously with the monarch or as a separate event.

Once a vital ritual, coronations have changed over time for a variety of socio-political and religious reasons; most modern monarchies have dispensed with them altogether, preferring simpler ceremonies to mark a monarch's accession. Coronations are still observed in the United Kingdom, Tonga, Thailand, Malaysia (federal and state), and Eswatini. The most recent coronation in the world was that of King Charles III and Queen Camilla in London in 2023. In Europe, most monarchs are required to take a simple oath in the presence of the country's legislature. Besides a coronation, a monarch's accession may be marked in many ways: some nations may retain a religious dimension to their accession rituals, while others have adopted simpler inauguration ceremonies, or even no ceremony at all. Some cultures use bathing or cleansing rites, the drinking of a sacred beverage, or other religious practices to achieve a comparable effect. Such acts symbolise the granting of divine favour to the monarch within the relevant spiritual-religious paradigm of the country.

A Gospel Book, Evangelion, or Book of the Gospels (Greek: Εὐαγγέλιον, Evangélion) is a codex or bound volume containing one or more of the four Gospels of the Christian New Testament – normally all four – centering on the life of Jesus of Nazareth and the roots of the Christian faith. The term is also used for a liturgical book, also called the Evangeliary, from which are read the portions of the Gospels used in the Mass and other services, arranged according to the order of the liturgical calendar.

Liturgical use in churches of a distinct Gospel book remains normal, often compulsory, in Eastern Christianity, and very common in Roman Catholicism and some parts of Anglicanism and Lutheranism.

Western Christianity is one of two subdivisions of Christianity (Eastern Christianity being the other). Western Christianity is composed of the Latin Church and Western Protestantism, together with their offshoots such as the Old Catholic Church, Independent Catholicism and Restorationism.

The large majority of the world's 2.3 billion Christians are Western Christians (about 2 billion: 1.3 billion Latin Catholic and 1.17 billion Protestant). One major component, the Latin Church, developed under the bishop of Rome. Out of the Latin Church emerged a wide variety of independent Protestant denominations, including Lutheranism and Anglicanism, starting from the Protestant Reformation in the 16th century, as did Independent Catholicism in the 19th century. Thus, the term "Western Christianity" does not describe a single communion or religious denomination but is applied to distinguish all these denominations collectively from Eastern Christianity.

Religion in Hungary is varied, with Christianity being the largest religion. In the national census of 2022, 42.5% of the population identified themselves as Christians, of whom 29.2% were adherents of Catholicism (27.5% following the Roman Rite, and 1.7% the Greek Rite), 9.8% of Calvinism, 1.8% of Lutheranism, 0.2% of Eastern Orthodox Christianity, and 1.5% of other Christian denominations. 1.3% of the population identified themselves as adherents of other religions; minorities practising Judaism, Islam, Buddhism, Hinduism, the Baháʼí Faith, Taoism, Hungarian Neopaganism and other Neopaganisms, and New Age, are present in the country. At the same time, 40.1% of the population did not answer, not identifying their beliefs or non-beliefs, while 16.1% identified themselves as not religious.

The dominant religion in Slovenia is Christianity, primarily the Catholic Church, which is the largest Christian denomination in the country. Other Christian groups having significant followings in the country include Eastern Orthodoxy and Protestantism (Lutheranism). Islam, Judaism and Hinduism are small minorities in Slovenia. About 18% of the population are either agnostic or atheist.

The main religion traditionally practiced in Latvia is Christianity. As of 2019, it is the largest religion (68.84%), though only about 7% of the population attends religious services regularly.

Lutheranism is the main Christian denomination among ethnic Latvians due to strong historical links with the Nordic countries and Northern Germany (see Hanseatic League), while Catholicism is most prevalent in eastern Latvia (Latgale), mostly due to Polish influence. The Latvian Orthodox Church is the third largest Christian church in Latvia, with adherents primarily among the Russian-speaking minority.

The term third order signifies, in general, lay members of Christian religious orders, who do not necessarily live in a religious community such as a monastery or a nunnery, and yet can claim to wear the religious habit and participate in the good works of a great order. Roman Catholicism, Lutheranism and Anglicanism all recognize third orders.

Third orders were a 12th-century adaptation of the medieval monastic confraternities. Members of third orders are known as tertiaries (Latin tertiarii, from tertius, "third"). In some cases, they may belong to a religious institute (a "congregation") that is called a "third order regular".

Sorbs (Upper Sorbian: Serbja; Lower Sorbian: Serby; German: Sorben pronounced [ˈzɔʁbn̩] ; Czech: Lužičtí Srbové; Polish: Serbołużyczanie; also known as Lusatians, Lusatian Serbs and Wends) are an indigenous West Slavic ethnic group predominantly inhabiting the parts of Lusatia located in the German states of Saxony and Brandenburg. Sorbs traditionally speak the Sorbian languages (also known as "Wendish" and "Lusatian"), which are closely related to Czech and Lechitic languages. Upper Sorbian and Lower Sorbian are officially recognized minority languages in Germany.

In the Early Middle Ages, the Sorbs formed their own principality, which later shortly became part of the early West Slavic Samo's Empire and Great Moravia, as were ultimately conquered by the East Francia (Sorbian March) and Holy Roman Empire (Saxon Eastern March, Margravate of Meissen, March of Lusatia). From the High Middle Ages, they were ruled at various times by the closely related Poles and Czechs, as well as the more distant Germans and Hungarians. Due to a gradual and increasing assimilation between the 17 and 20 centuries, virtually all Sorbs also spoke German by the early 20 century. In the newly created German nation state of the late 19 and early 20 centuries, policies were implemented in an effort to Germanize the Sorbs. These policies reached their climax under the Nazi regime, who denied the existence of the Sorbs as a distinct Slavic people by referring to them as "Sorbian-speaking Germans". The community is divided religiously between Roman Catholicism (the majority) and Lutheranism. The former Minister President of Saxony Stanislaw Tillich is of Sorbian origin.

Flavia Julia Helena (/ˈhɛlənə/; Ancient Greek: Ἑλένη, Helénē; c. AD 246/248 – 330), also known as Helena of Constantinople and in Christianity as Saint Helena, was a Greek Augusta of the Roman Empire and mother of Emperor Constantine the Great. She was born in the lower classes traditionally in the city of Drepanon, Bithynia, in Asia Minor, which was renamed Helenopolis.

Helena ranks as an important figure in the history of Christianity. In her final years, she made a religious tour of Syria Palaestina and Jerusalem, during which ancient tradition claims that she discovered the True Cross. The Eastern Orthodox Church, Catholic Church, Oriental Orthodox Churches, Anglican Communion, and the Lutheran Church revere her as a saint.

In ecclesiology, the Christian Church is what different Christian denominations conceive of as being the true body of Christians or the original institution established by Jesus Christ. "Christian Church" has also been used in academia as a synonym for Christianity, despite the fact that it is composed of multiple churches or denominations, many of which hold a doctrinal claim of being the one true church to the exclusion of the others.

For many Protestant Christians, the Christian Church has two components: the church visible, institutions in which "the Word of God purely preached and listened to, and the sacraments administered according to Christ's institution", as well as the church invisible—all "who are truly saved" (with these beings members of the visible church). In this understanding of the invisible church, "Christian Church" (or catholic Church) does not refer to a particular Christian denomination, but includes all individuals who have been saved. This is in contrast to the one true church applied to a specific concrete Christian institution, a Christian ecclesiological position maintained by the Catholic Church, the Lutheran Churches, the Eastern Orthodox Church, the Oriental Orthodox churches, Assyrian Church of the East, and the Ancient Church of the East. While holding this view, the Lutheran Churches teach that "there are indeed true Christians in other churches" as "other denominations also preach the Word of God, though mixed with error". The branch theory, which is maintained by some Anglicans, holds that those Churches that have preserved apostolic succession are part of the true Church, though the majority of Anglicanism has historically "followed the major continental Reformers in their doctrine of the true church, identifiable by the authentic ministry of word and sacrament, in their rejection of the jurisdiction of the pope, and in their alliance with the civil authority ('the magistrate')".

A church service (or a worship service) is a formalized period of Christian communal worship, often held in a church building. Most Christian denominations hold church services on the Lord's Day (offering Sunday morning and Sunday evening services); a number of traditions have mid-week services, while some traditions worship on a Saturday. In some Christian denominations, church services are held daily, with these including those in which the seven canonical hours are prayed, as well as the offering of the Mass, among other forms of worship. In addition to this, many Christians attend services on holy days such as Christmas, Ash Wednesday, Good Friday, Ascension Thursday, among others depending on the Christian denomination.

The church service is the gathering together of Christians to be taught the "Word of God" (the Christian Bible) and encouraged in their faith. Technically, the church in "church service" refers to the gathering of the faithful rather than to the physical place in which it takes place. In most Christian traditions services are presided over by clergy wherever possible, but some traditions utilize lay preachers. Styles of service vary greatly, from the Catholic, Lutheran, Eastern Orthodox, Oriental Orthodox, Reformed (Continental Reformed, Presbyterian and Congregationalist) and Anglican traditions of liturgical worship to informal worship characterized by certain free church traditions, common among Methodists and Baptists, that often combine worship with teaching for the believers, which may also have an evangelistic component appealing to backsliders and the non-Christians in the congregation (cf. altar call). Quakers and some other groups have no formal outline to their services, but allow the worship to develop as the participants present feel moved.

Pentecost (also called Whit Sunday, Whitsunday or Whitsun) is a Christian holiday that takes place on the 49th day (50th day when inclusive counting is used) after Easter. It commemorates the descent of the Holy Spirit upon the Apostles of Jesus, Mary, and other followers of the Christ, while they were in Jerusalem celebrating the Feast of Weeks, as described in the Acts of the Apostles (Acts 2:1–31). Pentecost marks the "Birthday of the Church".

Pentecost is one of the Great feasts in the Eastern Orthodox Church, a Solemnity in the Roman Rite of the Catholic Church, a Festival in the Lutheran Churches, and a Principal Feast in the Anglican Communion. Many Christian denominations provide a special liturgy for this holy celebration. Since its date depends on the date of Easter, Pentecost is a "moveable feast". The Monday after Pentecost is a legal holiday in many European, African and Caribbean countries.

In Christian denominations, an archbishop is a bishop of higher rank or office. In most cases, such as the Catholic Church, there are many archbishops who either have jurisdiction over an ecclesiastical province in addition to their own archdiocese (with some exceptions), or are otherwise granted a titular archbishopric. In others, such as the Lutheran Church of Sweden, the title is only borne by the leader of the denomination.