The History of the Second Bulgarian Empire
1018–1422 · five eras, thirteen chapters
The story of the Second Bulgarian Empire, told as one connected history: the long twilight under Byzantium, the brothers' revolt of 1185, the imperial zenith under Ivan Asen II, the Mongol shock and the slow fracture, and the last resistance at Vidin. Read it straight through, or open any chapter to follow the rulers, battles and sources behind it.
Before the Empire
1018–1185Bulgaria under Constantinople — the embers of statehood before the revolt.
The Ascent
1185–1241Rebellion, restoration, and the climb to imperial power.
Founding of the Second Empire
Between 1185 and 1197, Theodore and Asen turned a humiliating appeal to Isaac II into a revolt that, with Cuman aid and repeated Byzantine failures, became the restored Bulgarian state centered on Tărnovo. The chapter follows the rise from insurgency to monarchy, the sacral and institutional framing of rule, and the dynastic succession that ended the founding phase with Kaloyan's accession.
1197–1207Kaloyan — Wars with the Crusaders
Kaloyan inherited the restored Bulgarian throne in 1197 and quickly turned the kingdom into a more aggressive Balkan power, fighting Byzantium through alliances, sieges, and opportunistic diplomacy. Between his negotiations with Innocent III, the Latin conquest of Constantinople, and his victories at Adrianople and elsewhere, he brought Bulgaria to the center of regional politics before dying at Thessalonica in 1207.
1207–1218Boril — Internal Struggles
Boril seized the Bulgarian throne in 1207 after Kaloyan’s death, but his reign was immediately undermined by dynastic rivalry, regional defections, and repeated defeats against the Latins and their Balkan allies. He tried to shore up authority through warfare, alliance-making, and the anti-Bogomil council of 1211, yet the kingdom steadily fragmented until John Asen II returned in 1218 and overthrew him.
1218–1241Ivan Asen II — Golden Age
Ivan Asen II returned from exile in 1218, restored the senior Asen line, and used a blend of dynastic marriage, diplomacy, and war to rebuild Bulgaria’s power. His victory at Klokotnitsa in 1230 and the subsequent reordering of church, coinage, and administration made Tarnovo the center of a major Balkan monarchy, but his death in 1241 left the throne to his infant son Koloman.
Instability & Recovery
1241–1330Mongol pressure and contested crowns give way to a fragile recovery.
First Mongol Invasion
After Ivan II Asen’s death, Bulgaria entered a decade of child-rulership, regency, and accelerating territorial decline. The Mongol invasion of 1242 brought devastation and likely tribute, while Nicaea and Hungary exploited Bulgarian weakness; a brief recovery in 1254 was reversed by Theodore II Laskaris, and Michael II Asen’s murder in 1256 pushed the kingdom into crisis.
1256–1280Constantine Tikh and Ivaylo's Uprising
From the murder of Michael II Asen in 1256 to the accession of George I Terter in 1280, the chapter traces the collapse of dynastic stability in Bulgaria. Constantine Tikh tried to shore up his rule through marriage, diplomacy, and war, but pressure from Byzantium, Hungary, Nogai's Tatars, and internal fragmentation paved the way for Ivaylo's uprising and a brief Byzantine-backed rival claim.
1280–1300Onset of Instability
The chapter traces the collapse of central authority in Bulgaria from 1280 to 1300, as George I Terter survived only by balancing the Horde, Byzantium, and powerful local lords. Repeated Tatar pressure, frontier losses, and dynastic turnover fragmented the kingdom until Theodore Svetoslav seized power in 1300.
1300–1330Theodore Svetoslav — Partial Recovery
The chapter follows Theodore Svetoslav’s violent accession in 1300 and his subsequent restoration of Bulgarian authority through internal consolidation, frontier bargaining, and a decisive series of wars against Byzantium. That recovery endured into the reign of Michael Shishman, but the era ended in 1330 with the Bulgarian defeat at Velbuzhd, which reopened dynastic instability.
The Golden Autumn
1330–1355A late flourishing of letters and art as the borders fell quiet.
Fragmentation & Fall
1355–1422The realm splinters and falls to the Ottomans; Vidin resists to the last.
Division of the Empire
Between 1355 and 1371, the Bulgarian Empire moved from dynastic continuity toward open fragmentation under pressure from Byzantium, Hungary, regional lords, and the advancing Ottomans. The court, church, and literary culture still projected independence, but military defeats and foreign interventions split the realm into rival centers, ending with the Ottoman victory at the Maritsa.
1371–1396Fall to Ottoman Power
After Ivan Alexander's death in 1371, the Bulgarian lands fragmented into competing centers while Ottoman victories steadily turned Tarnovo and Vidin into dependent polities. The chapter traces the loss of cities, the imposition of vassalage, and the fall of Tarnovo and Vidin, while showing how church, letters, and charters preserved continuity amid political collapse.
1396–1422Vidin Tsardom — Last Resistance
The chapter follows Vidin as the last Bulgarian stronghold on the Danube, from its final courtly gestures before conquest to its fall after the crusader defeat at Nicopolis in 1396. Thereafter the Vidin line survives mainly through Constantine's exile, a brief revival of hope during the Ottoman interregnum, the uprising of Constantine and Fruzhin, and finally Constantine's death in 1422.