Bayezid I, also known as Bayezid the Thunderbolt, was the sultan of the Ottoman Empire from 1389 to 1402. He adopted the title of Sultan-i Rûm, Rûm being the Arabic name for the Eastern Roman Empire.
Accession of Bayezid I in the Iskendername manuscript Biblioteca Nazionale Marciana, cod. or. 90 (c. 1460)