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The Ottoman Dynasty eventually conquered the empire established by the Seljuk Turks
Earlier on the Seljuk Turks controlled the Middle East. Later, the Ottoman Turks were in control.
Internal fighting between Seljuk Turks
The Byzantine Empire had been growing steadily smaller and weaker for centuries, but it was finally defeated altogether by the Ottoman Turks in 1453.
Modern Turkey was controlled by a combination of Seljuk Turks and Byzantines.