John Chrysostom in the context of "Liturgy of the Catechumens"

Divine Liturgy (Koine Greek: Θεία Λειτουργία, romanized: Theía Leitourgía, pronounced [ˈθi.a li.turˈʝi.a]) or Holy Liturgy is the usual name used in most Eastern Christian rites for the Eucharistic service.

The Eastern Orthodox Churches, Eastern Catholic Churches and Eastern Lutheran Churches believe the Divine Liturgy transcends both time and the world. All believers are seen as united in worship in the Kingdom of God along with the departed saints and the angels of heaven. Everything in the liturgy is seen as symbolic, but not merely so, for it makes present the unseen reality. According to Eastern tradition and belief, the liturgy's roots go back to the adaptation of Jewish liturgy by Early Christians. The first part, termed the "Liturgy of the Catechumens", includes the reading of scriptures like those in a synagogue, and in some places, also a sermon/homily. The second half, the "Liturgy of the Faithful", is based on the Last Supper and the first Eucharistic celebrations by Early Christians. Eastern Christians (and many other branches of Christianity) believe that the Eucharist is the central part of the service in which they participate, as they believe the bread and wine truly become the real Body and Blood of Christ, and that by partaking of it they jointly become the Body of Christ (that is, the Church). Each liturgy has its differences from others, but most are very similar to each other with adaptations based on tradition, purpose, culture and theology.

Eastern Lutheranism (also known as Byzantine Lutheranism or Byzantine Rite Lutheranism) refers to Eastern Protestant Lutheran churches, such as those of Ukraine and Slovenia, that use a form of the Byzantine Rite as their liturgy. It is unique in that it is based on the Eastern Christian rite used by the Eastern Orthodox Church, while incorporating theology from the Divine Service contained in the Formula Missae, the base texts for Lutheran liturgics in the West.

Eastern Lutherans use the Julian calendar for the calendar and thus observe feast days and liturgical seasons, such as Great Lent, in a fashion similar to Orthodox customs. As such, many Byzantine Lutheran holy days are shared with those of the Eastern Orthodox Church; in addition, Eastern Lutheran churches are constructed in accordance with Byzantine architecture. Posture during worship, such as bowing, is identical to that in other parts of Eastern Christianity. Within Byzantine Rite Lutheranism, the calendar of saints includes persons esteemed in Eastern Christianity, such as John Chrysostom and Nestor the Chronicler, as well as those specific to the Lutheran Church, such as Lucas Cranach the Elder and Martin Luther.

Aelia Eudoxia (/ˈiːliə juˈdɒkʃə -ˈdɒksiə/; Ancient Greek: Αἰλία Εὐδοξία; died 6 October 404) was Eastern Roman empress by marriage to the Roman emperor Arcadius. The marriage was arranged by Eutropius, one of the eunuch court officials, who was attempting to expand his influence. As Empress, she came into conflict with John Chrysostom, the Patriarch of Constantinople, who denounced imperial and clerical excess. She had five children, four of whom survived to adulthood, including her only son and future emperor Theodosius II, but she had two additional pregnancies that ended in either miscarriages or stillbirths and she died as a result of the latter one.

The Orthodox Cathedral (Romanian: Catedrala Ortodoxă), also known as the Metropolitan Cathedral (Romanian: Catedrala Mitropolitană), is a Romanian Orthodox church in Timișoara. The cathedral is the seat of the Archbishopric of Timișoara and the Metropolis of Banat. It is dedicated to the Three Holy Hierarchs, Basil the Great, Gregory the Theologian and John Chrysostom.

Built on an area of 1,542 m, it has 11 towers, of which the central one has a height of 90.5 m, making it the second tallest church in Romania, after the People's Salvation Cathedral in Bucharest. The cathedral is listed in the National Register of Historic Monuments.

A homily (from Greek ὁμιλία, homilía) is a commentary that follows a reading of scripture, giving the "public explanation of a sacred doctrine" or text. The works of Origen and John Chrysostom (known as Paschal Homily) are considered exemplary forms of Christian homily.

In Catholic, Anglican, Lutheran, and Eastern Orthodox churches, a homily is usually given during Mass (Divine Liturgy or Holy Qurbana for Orthodox and Eastern Catholic Churches, and Divine Service for the Lutheran Church) at the end of the Liturgy of the Word. Many people consider it synonymous with a sermon.

The Liturgy of Saint John Chrysostom is the most celebrated divine liturgy in the Byzantine Rite. It is named after its core part, the anaphora attributed to Saint John Chrysostom, Archbishop of Constantinople in the 5th century.

The Three Hierarchs (Ancient Greek: Οἱ Τρεῖς Ἱεράρχαι; Greek: Οι Τρεις Ιεράρχες) of Eastern Christianity refers to Basil the Great (also known as Basil of Caesarea), Gregory the Theologian (also known as Gregory of Nazianzus) and John Chrysostom. They were highly influential bishops of the early church who played pivotal roles in shaping Christian theology. In Eastern Christianity they are also known as the Three Great Hierarchs and Ecumenical Teachers, while in Roman Catholicism the three are honored as Doctors of the Church. The three are venerated as saints in Eastern Orthodoxy, Catholicism, Anglicanism, and other Christian churches.