Kaliman Asen I of Bulgaria

Kaliman Asen I (1234–1246) was tsar of Bulgaria from 1241, succeeding his father Ivan Asen II at seven; his mother was Anna Maria of Hungary. Regents ruled during his minority, and early in his reign Bulgaria, the Latin Empire and Nicaea made a two-year truce.

In March 1242 the Mongol prince Kadan invaded, destroying Tarnovo and other fortresses; Bulgaria later paid an annual tribute. In 1245 Pope Innocent IV urged him to unite the Bulgarian Church with Rome. Kaliman died at twelve in August or September 1246, amid rumors of poisoning.