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In 1231, Ertuğrul, Osman's father, conquered the Byzantine town of Thebasion, which was renamed to Söğüt and became the initial capital of his territory
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Osman was born in the year 1258
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The Valide Sultan, also known as Mother sultan, was the title held by the mother of a ruling Sultan in the Ottoman Empire. Osman was married to her in the year 1280
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Osman became chief, or Bey, after his father’s death in 1281
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Osman's Coronation began in 1281
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Osman announced the independence of his own small kingdom from the Seljuk Turks in 1299. The westward drive of the Mongol invasions had pushed many Muslims toward Osman's Anatolian principality, a power base that Osman was quick to consolidate. As the Byzantine Empire declined, the Ottoman Empire rose to take its place.
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Osmans reign started in 1299
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Osman ended his coronation in the year 1299
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Osman's reign ended in 1324
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Osman died in the year 1326
