Manuel II Palaeologus (1348?-1425), son and successor of the Byzantine emperor
John V Palaeologus. In 1391 he escaped from the court of the Ottoman sultan
Bayazid I, who was holding him hostage, to take the crown. Thereupon Bayazid
laid siege to Constantinople. The city was in danger of falling when the
sultan was forced to raise the siege and defend his country against the Mongol
conqueror Tamerlane. Manuel then traveled to Europe to gain help from the
western kingdoms but was unsuccessful. In 1402, however, Tamerlane defeated
Bayazid at Ankara, and consequently Manuel enjoyed 20 years of peace. In 1422
the Byzantine Empire was attacked by the new Turkish sultan, Murad II, who
conquered the Peloponnesus (modern Greek Pelopónnisos) and forced Manuel to
pay tribute for the remaining three years of his reign. Manuel was succeeded
by his son John VIII Palaeologus, who had been coemperor since 1421.