Middle Ages

The modern era or the modern period is considered the current historical period of human history. It was originally applied to the history of Europe and Western history for events that came after the Classical antiquity and the Middle Ages, often from around the year 1500, like the Reformation in Germany giving rise to Protestantism. Since the 1990s, it has been more common among historians to refer to the period after the Middle Ages and up to the 19th century as the early modern period. The modern period is today more often used for events from the 19th century until today. The time from the end of World War II (1945) can also be described as being part of contemporary history. The common definition of the modern period today is often associated with events like the French Revolution, the Industrial Revolution, and the transition from nationalism toward the liberal international order.

The modern period has been a period of significant development in the fields of science, politics, warfare, and technology. It has also been an Age of Discovery and globalization. During this time, the European powers and later their colonies, strengthened their political, economic, and cultural colonization of the rest of the world. It also created a new modern lifestyle and has permanently changed the way people around the world live.

The March of Tuscany was a march of the Kingdom of Italy and the Holy Roman Empire during the Middle Ages. Located in northwestern central Italy, it bordered the Papal States to the south, the Ligurian Sea to the west and Lombardy to the north. It comprised a collection of counties, largely in the valley of the River Arno, originally centered on Lucca.
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Medieval communes in the European Middle Ages had sworn allegiances of mutual defense (both physical defense and of traditional freedoms) among the citizens of a town or city. These took many forms and varied widely in organization and makeup.

Communes are first recorded in the late 11th and early 12th centuries, thereafter becoming a widespread phenomenon. They had greater development in central-northern Italy, where they became city-states based on partial democracy. At the same time in Germany they became free cities, independent from local nobility.

The Republic of Venice (Venetian: Repùblega Vèneta; Italian: Repubblica di Venezia) was a sovereign state and maritime republic in Northeast Italy, which existed for a millennium between the 8th century and 1797.

It was based in the lagoon communities of the historically prosperous city of Venice, and was a leading European economic and trading power during the Middle Ages and the Renaissance, the most successful of Italy's maritime republics. By the late Middle Ages, it held significant territories in the mainland of northern Italy, known as the Domini di Terraferma, along with most of the Dalmatian coast on the other side of the Adriatic Sea, and Crete and numerous small colonies around the Mediterranean Sea, together known as the Stato da Màr.

The Visconti of Milan are a noble Italian family. They rose to power in Milan during the Middle Ages where they ruled from 1277 to 1447, initially as lords and then as dukes, and several collateral branches still exist. The effective founder of the Visconti Lordship of Milan was the Archbishop Ottone, who wrested control of the city from the rival Della Torre family in 1277.

A castle is a type of fortified structure built during the Middle Ages predominantly by the nobility or royalty and by military orders. Scholars usually consider a castle to be the private fortified residence of a lord or noble. This is distinct from a mansion, palace, and villa, whose main purpose was exclusively for pleasance and are not primarily fortresses but may be fortified. Use of the term has varied over time and, sometimes, has also been applied to structures such as hill forts and 19th- and 20th-century homes built to resemble castles. Over the Middle Ages, when genuine castles were built, they took on a great many forms with many different features, although some, such as curtain walls, arrowslits, and portcullises, were commonplace.

European-style castles originated in the 9th and 10th centuries after the fall of the Carolingian Empire, which resulted in its territory being divided among individual lords and princes. These nobles built castles to control the area immediately surrounding them and they were both offensive and defensive structures: they provided a base from which raids could be launched as well as offering protection from enemies. Although their military origins are often emphasised in castle studies, the structures also served as centres of administration and symbols of power. Urban castles were used to control the local populace and important travel routes, and rural castles were often situated near features that were integral to life in the community, such as mills, fertile land, or a water source.

The Armenian highlands (Armenian: Հայկական լեռնաշխարհ, romanized: Haykakan leṙnašxarh; also known as the Eastern Anatolian highlands, Armenian upland, Armenian plateau, or Armenian tableland) comprise the most central and the highest of the three plateaus that together form the northern sector of West Asia. Clockwise starting from the west, the Armenian highlands are bounded by the Anatolian plateau, the Caucasus, the Kura-Aras lowlands, the Iranian Plateau, and Mesopotamia. The highlands are divided into western and eastern regions, defined by the Ararat Valley where Mount Ararat is located. Since the turn of the 20th century, Western Armenia has been relabeled as "Eastern Anatolia" by Ottoman and Turkish authorities. Eastern Armenia is part of Lesser Caucasus, which was historically known by some as the Anti-Caucasus, meaning "opposite of the Caucasus".

During the Iron Age, the region was known by variations of the name Ararat (Urartu, Uruatri, Urashtu). Later, the Highlands were known as Armenia Major, a central region to the history of Armenians, and one of the four geopolitical regions associated with Armenians, the other three being Armenia Minor, Sophene, and Commagene. The highlands are primarily defined by the geographical dispersal of its native inhabitants, the Armenians. Prior to the appearance of nominally Armenian people in historical records, historians have hypothesized that the region must have been home to various ethnic groups who became homogenous when the Armenian language came to prominence. The population of the Armenian highlands has had a high level of regional genetic continuity for over 6,000 years. Recent studies indicate that the Armenian people descend from the indigenous people of the Armenian highlands and form a distinct genetic isolate in the region. The region was also inhabited during Antiquity by minorities such as Assyrians, Georgians, Greeks, Jews, and Iranians. During the Middle Ages, Arabs and particularly Turkmens and Kurds settled in large numbers in the Armenian highlands.

An emperor (from Latin: imperator, via Old French: empereor) is the (male) ruler of an empire. Empress, the female equivalent, may indicate an emperor's wife (empress consort), mother/grandmother (empress dowager/grand empress dowager), or a woman who rules in her own right and name (empress regnant or suo jure). Emperors are generally recognized to be of the highest monarchic honour and rank, surpassing king. In Europe, the title of Emperor has been used since the Middle Ages, considered in those times equal or almost equal in dignity to that of Pope due to the latter's position as visible head of the Church and spiritual leader of the Catholic part of Western Europe. The emperor of Japan is the only currently reigning monarch whose title is translated into English as "Emperor", although he no longer reigns over an empire.

Both emperors and kings are monarchs or sovereigns, both emperor and empress are considered monarchical titles. In as much as there is a strict definition of emperor, it is that an emperor has no relations implying the superiority of any other ruler and typically rules over more than one nation. Therefore, a king might be obliged to pay tribute to another ruler, or be restrained in his actions in some unequal fashion, but an emperor should in theory be completely free of such restraints. However, monarchs heading empires have not always used the title in all contexts—the British sovereign did not assume the title Empress of the British Empire even during the incorporation of India, though she was declared Empress of India.

Music theory is the study of theoretical frameworks for understanding the practices and possibilities of music. The Oxford Companion to Music describes three interrelated uses of the term "music theory": The first is the "rudiments", that are needed to understand music notation (key signatures, time signatures, and rhythmic notation); the second is learning scholars' views on music from antiquity to the present; the third is a sub-topic of musicology that "seeks to define processes and general principles in music". The musicological approach to theory differs from music analysis "in that it takes as its starting-point not the individual work or performance but the fundamental materials from which it is built."

Music theory is frequently concerned with describing how musicians and composers make music, including tuning systems and composition methods among other topics. Because of the ever-expanding conception of what constitutes music, a more inclusive definition could be the consideration of any sonic phenomena, including silence. This is not an absolute guideline, however; for example, the study of "music" in the Quadrivium liberal arts university curriculum, that was common in medieval Europe, was an abstract system of proportions that was carefully studied at a distance from actual musical practice. But this medieval discipline became the basis for tuning systems in later centuries and is generally included in modern scholarship on the history of music theory.

The earliest known world maps date to classical antiquity, the oldest examples of the 6th to 5th centuries BCE still based on the flat Earth paradigm. World maps assuming a spherical Earth first appear in the Hellenistic period. The developments of Greek geography during this time, notably by Eratosthenes and Posidonius culminated in the Roman era, with Ptolemy's world map (2nd century CE), which would remain authoritative throughout the Middle Ages. Since Ptolemy, knowledge of the approximate size of the Earth allowed cartographers to estimate the extent of their geographical knowledge, and to indicate parts of the planet known to exist but not yet explored as terra incognita.

With the Age of Discovery, during the 15th to 18th centuries, world maps became increasingly accurate; exploration of Antarctica, Australia, and the interior of Africa by western mapmakers was left to the 19th and early 20th century.