Theodora Palaiologina

Theodora Palaiologina (fl. 1308–1330) was a Byzantine princess, daughter of Emperor Michael IX and sister of Andronikos III. In spring 1308 she married Tsar Theodore Svetoslav of Bulgaria to seal the peace ending his war with Byzantium.

Widowed in 1321, she stayed at Tarnovo and in 1324 married the new tsar Michael Shishman after he set aside his first wife. When Michael fell at Velbazhd in July 1330 and his ex-wife returned, Theodora left for Constantinople, where she became a nun named Theodosia.