Ottoman Empire, empire created by Turkish tribes that grew to be one of the most powerful states in the world in the 15th and 16th centuries. Its dynasty was founded by a prince (bey), Osman, after the Mongols defeated the Seljuqs at the end of the 13th century. The empire disintegrated after World War I.

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A Greek Sailor. The thirty-first Odah (regiment, chamber) of the Janissaries, whose symbol is an anchor, is employed in the sea service.

The costume of Turkey. Ottoman Empire. Officials and ethnic groups 1802. Described and illustrated by Octavian Dalvimart.

Greek woman from Marmara island. Historical Ottoman Empire officials and ethnic groups. The costume of Turkey by Octavian Dalvimart.

Imam is an Islamic leadership position. For Sunni Muslims, Imam is most commonly used as the title of a worship leader of a mosque. In this context, imams may lead Islamic worship services, lead prayers, serve as community leaders, and provide religious guidance. Thus for Sunnis, anyone can study the basic Islamic sciences and become an Imam.