Osman I, also called Osman Gazi, (born c. 1258—died 1324 or 1326), ruler of a Turkmen principality in northwestern Anatolia who is regarded as the founder of the Ottoman Turkish state. Both the name of the dynasty and the empire that the dynasty established are derived from the Arabic form (ʿUthmān) of his name.
DIED1324 or 1326
Sogut, Turkey
TITLE / OFFICE
Sultan, Ottoman Empire (1299-1324)
Osman was descended from the Kayı branch of the Oğuz Turkmen. His father, Ertugrul, had established a principality centred at Sögüt. With Sögüt as their base, Osman and the Muslim frontier warriors (Ghazis) under his command waged a slow and stubborn conflict against the Byzantines, who sought to defend their territories in the hinterland of the Asiatic shore opposite Constantinople (now Istanbul). Osman gradually extended his control over several former Byzantine fortresses, including Yenişehir, which provided the Ottomans with a strong base to lay siege to Bursa and Nicaea (now İznik), in northwestern Anatolia. Osman was succeded by his son Orhan, who captured Bursa on April 6, 1326. Ottoman tradition holds that Osman died just after the capture of Bursa, but some scholars have argued that his death should be placed in 1324, the year of Orhan’s accession.
Alternative Title: sulṭān
Sultan, Arabic Sulṭān, originally, according to the Qurʾān, moral or spiritual authority; the term later came to denote political or governmental power and from the 11th century was used as a title by Muslim sovereigns. Maḥmūd of Ghazna (reigned AD 998–1030) was the first Muslim ruler to be called sultan by his contemporaries, and under the Seljuqs of Anatolia and Iran it became a regular title. Thereafter it was frequently conferred on sovereigns by the caliph (titular head of the Muslim community) and came to be used throughout the Islāmic world.