The Ottoman Empire originated as a nomadic Turkish group from Central Asia and rose to become a powerful world empire. Through military conquest, the Ottomans brought large territories under Islamic rule by the 15th century, including the capturing of Constantinople in 1453, marking the fall of the Byzantine Empire and expansion of Ottoman power. Under Suleiman the Magnificent's rule from 1520-1566, the empire established a strict social class system and saw advancements in areas like science, architecture, and literature.