Facts: - title: byzantine empress consort - mother: sarah-theodora - predecessor: helena kantakouzene - house: house of shishman house of palaiologus - birth date: 1348 - issue: john vii palaiologos - consort: yes - caption: manuscript alexander '' -rrb- . miniature of keratsa -lrb- '' tetraevangelia of ivan - succession: byzantine empress consort - reign: 12 august 1376 & ndash ; 1 july 1379 - spouse: andronikos iv palaiologos - death date: 1390 - father: ivan alexander - name: keratsa-maria - death place: byzantine empire - birth place: bulgaria - successor: helena kantakouzene - image size: 100px - image: keratsa of bulgaria.jpg Based on these bullet points, write a short biography describing the life of keratsa of bulgaria .
The answer to this question is:
keratsa-maria of bulgaria -lrb- -rrb- -lrb- 1348 -- 1390 -rrb- was princess of bulgaria during the second bulgarian empire and empress of byzantine empire .she was the daughter of tsar ivan alexander of bulgaria and his second wife , a converted jewess , theodora .