The wars resulted with the collapse and subordination of the Bulgarian Empire , and effectively came to an end Process_end with the Ottoman conquest of Tarnovo in July 1393 , although other Bulgarian territories , such as the Tsardom of Vidin , held Defending out slightly longer .

From the 13th century , the two main Balkan powers Byzantium and Bulgaria fell Motion_directional victims to a process of decentralization , as local feudal lords grew Expansion stronger and more independent from the emperors in Constantinople and Tarnovo .

Later , he made Manufacturing a triumphant entry Arriving in the capital Tarnovo , married Forming_relationships Maria , the emperor 's widow , and forced Request the nobility to recognize Know him as Emperor of Bulgaria .

In his absence the nobility in Tarnovo opened Openness the gates to Ivan Asen III .

The brothers Peter and Asen built Building the Church of St Demetrius of Thessaloniki in Tarnovo , dedicated Giving to Saint Demetrius , who was traditionally considered a patron of the Byzantine city of Thessaloniki , and claimed Statement that the Saint had ceased Process_end to favour the Byzantines : `` God had decided Deciding to free Releasing the Bulgarians and the Vlach people and to lift Process_end the yoke that they had borne Bringing for so long '' .