Second Bulgarian Empire
Administration, territorial division, society

The Second Bulgarian Empire was a hereditary monarchy ruled by a Tsar —the Bulgarian word for Emperor that originated in the 10th century during the First Bulgarian Empire. The monarchs of Bulgaria styled themselves, "In Christ the Lord Faithful Emperor and Autocrat of all Bulgarians" or variations, sometimes including "...and Romans, Greeks, or Vlachs". The term all Bulgarians was added in the 14th century following the loss of many Bulgarian-populated territories and signified that the monarch in Tarnovo was the emperor of all Bulgarian people, even those who lived beyond the country's political borders.

The Emperor held supreme power over secular and religious affairs in an autocracy; his personal abilities played an important role in the country's well-being. When the monarch was an infant, the government was headed by a regency that included the mother-empress, the Patriarch, and senior members of the ruling dynasty. As the processes of feudal fragmentation accelerated in the 14th century, it became customary for the monarch's sons to receive imperial titles during their father's lifetime; sons were styled co-rulers or junior emperors.

Unlike the First Empire, the administration during the Second Bulgarian Empire was heavily influenced by the Byzantine system of administration. Most of the titles of the nobility, the court, and the administration were directly adopted from their Byzantine counterparts in Byzantine Greek, or were translated into Bulgarian. There were some differences in the ranking systems between the two countries—there are few surviving sources about the precise obligations, insignia, or ceremonial affairs of the medieval Bulgarian administration. The Bolyar Council included the greater bolyars and the Patriarch; it discussed issues about external and internal policies, such as declarations of war, formations of alliances, or the signing of peace treaties. The highest-ranking administrative officials were the great logothete, who had the functions of a first minister, and the protovestiarios, who was responsible for the treasury and finance. High court titles such as despot and sebastokrator were awarded to the Emperor's relatives but were not strictly concerned with administrative functions.

The capital of the Second Bulgarian Empire was Tarnovo, which was also the centre of its own administrative unit under the direct authority of the emperor. Bulgaria was divided into provinces, whose numbers varied with the territorial evolution of the country. In surviving primary sources, the provinces were named with the Byzantine term hora or the Bulgarian terms zemya (земя), strana (страна), and oblast (област), usually named after its main city. The provincial governors were titled "duke" or kefalia — both from Byzantine dux and kephale —and were directly appointed by the emperor. The provinces were subdivided into katepanika (sing. katepanikon, from the Byzantine katepanikion), which were ruled by katepans who were subordinated to the dukes. During the reign of Ivan Asen II (1218–41), the provinces included Belgrade, Braničevo, Boruy, Adrianople, Dimotika, Skopje, Prilep, Devol, and Albania.

During the Second Empire, Bulgarian society was divided into three social classes: clergy, nobility, and peasantry. The nobility included the aristocracy: the bolyars, whose origin was the older Bulgarian boilas from the First Empire, the judges, and the "whole army". The bolyars were subdivided into greater and lesser bolyars. The former possessed large estates, which at times included tens and even hundreds of villages, and held high administrative and military posts. The peasants formed the bulk of the third class and were subordinated either under the central authorities or under local feudal lords. With time, the number of the latter increased as a result of the process of feudalization of Bulgaria. The main groups of peasants were paritsi and otrotsi. Both could own land but only the paritsi could inherit property; the latter could not, since it was provided by the feudal lords.
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