List of Bulgarian monarchs in the context of "Strez"

Peter I (Church Slavonic: Петръ А҃; Bulgarian: Петър I; died 30 January 970) was the emperor (tsar) of Bulgaria from 27 May 927 to 969. Facing Bogomilism and rebellions by his brothers and also by Časlav Klonimirović early on in his reign, Peter secured more success later in life; he ensured the retreat of the invading Rus by inciting Bulgaria's allies, the Pechenegs, to attack Kiev itself. Traditionally seen as a weak ruler who lost land and prestige, recent scholarship challenges this view, emphasizing the empire's affluence and internal peace. Considered a good ruler during the Middle Ages, his name was adopted by later leaders trying to restore Bulgarian independence under Byzantine rule to emphasize legitimacy and continuity.

Boris II (Church Slavonic: Борисъ В҃; Bulgarian: Борис II; c. 931 – 977) was the emperor (tsar) of Bulgaria from 969 to 977 (in Byzantine captivity from 971).

Roman (Bulgarian: Роман; 930s–997) was the emperor (tsar) of Bulgaria from 977 to 991, being in Byzantine captivity thereafter still claiming the title.

The Gate of Trajan or Trajan's Gate (Bulgarian: Траянови врата, romanized: Trayanovi vrata) is a historic mountain pass near Ihtiman, Bulgaria. In antiquity, the pass was called Succi. Later it was named after Roman Emperor Trajan, on whose order a fortress by the name of Stipon was constructed on the hill over the pass, as a symbolic border between the provinces of Thrace and Macedonia.

The pass is primarily known for the major medieval battle of 17 August 986, during which the forces of Byzantine Emperor Basil II were routed by Tsar Samuil of Bulgaria, effectively halting a Byzantine campaign in the Bulgarian lands.

After the Russo-Turkish War of 1877–1878, the 1878 Treaty of Berlin set up an autonomous state, the Principality of Bulgaria, within the Ottoman Empire. Although remaining under Ottoman sovereignty, it functioned independently, taking Alexander of Battenberg as its first prince in 1879. In 1885 Alexander took control of the still-Ottoman Eastern Rumelia, officially under a personal union. Following Prince Alexander's abdication (1886), a Bulgarian Assembly elected Ferdinand I as prince in 1887. Full independence from Ottoman control was declared in 1908.

In the 1912–1913 Balkan Wars, Bulgaria initially formed an alliance with Greece, Serbia and Montenegro against the Ottoman Empire, and together they conquered a great deal of Ottoman territory. Bulgaria, however, unhappy with the resulting division of territory, soon went to war against its former allies Serbia and Greece and lost territory it had gained in the first war. The First World War (1914–1918) saw Bulgaria fighting (1915–1918) alongside Germany, Austria-Hungary, and the Ottoman Empire. Defeat led to the Treaty of Neuilly-sur-Seine (27 November 1919), in accordance with which Bulgaria lost further territory. Social problems and political instability persisted throughout the Interwar period. In the Second World War (1939–1945), Bulgaria again allied with Germany (March 1941). Although Sofia attempted to pull out of the war as the Soviet Union advanced towards its territory (1944), the Red Army invaded (September 1944), and a communist government came to power (1944–1946) and established the People's Republic of Bulgaria (1946–1990).

The Round Church (Bulgarian: Кръгла църква, Kragla tsarkva), also known as the Golden Church (Златна църква, Zlatna tsarkva) or the Church of St John (църква "Свети Йоан", tsarkva "Sveti Yoan"), is a large partially preserved early medieval Eastern Orthodox church. It lies in Preslav, the former capital of the First Bulgarian Empire, today a town in northeastern Bulgaria. The church dates to the early 10th century, the time of Tsar Simeon I's rule, and was unearthed and first archaeologically examined in 1927–1928.

Considered to be one of the most impressive examples of medieval Bulgarian architecture, the Round Church takes its name from the distinctive shape of one of its three sections, the cella (naos), which is a rotunda that serves as a place of liturgy. The church's design also includes a wide atrium and a rectangular entrance area, or narthex, marked by two circular turrets.

Ivan Alexander (Bulgarian: Иван Александър, transliterated Ivan Aleksandǎr, pronounced [iˈvan ɐlɛkˈsandɐr]; original spelling: ІѠАНЪ АЛЄѮАНРЪ), also sometimes anglicized as John Alexander, ruled as Emperor (Tsar) of Bulgaria from 1331 to 1371, during the Second Bulgarian Empire. The date of his birth is unknown. He died on 17 February 1371.

The long reign of Ivan Alexander is considered a transitional period in Bulgarian medieval history. Ivan Alexander began his rule by dealing with internal problems and external threats from Bulgaria's neighbours, the Byzantine Empire and Serbia, as well as leading his empire into a period of economic recovery and cultural and religious renaissance.