caption predecessor successor succession signature coronation spouse issue image article_title name reign
seal of king tvrtko i stephen ii dabiša king of bosnia ban of bosnia potpis kralja stefana tvrtka i.png 1377 dorothea of bulgaria ostoja of bosnia seal of tvrtko i of bosnia.jpg tvrtko i of bosnia
 tvrtko i 26 77 october 1377 -- 10 march 1391 1353 --
tvrtko i of bosnia

stephen tvrtko i -lrb- 1338 -- 10 march 1391 -rrb- was ban of bosnia from 1353 until his coronation in 1377 and king of bosnia thereafter .
he also claimed the title king of serbia from 1377 and the title king of croatia after 1390 .
a member of the bosnian kotromanić dynasty which had ruled the banate of bosnia , he was a `` politically adept and religiously tolerant ruler '' and under his command bosnia reached its peak and became the strongest power in the balkans , conquering parts of what is today serbia , croatia and montenegro .
