<P> The sultans of the Ottoman Empire (Turkish: Osmanlı padişahları), who were all members of the Ottoman dynasty (House of Osman), ruled over the transcontinental empire from its perceived inception in 1299 to its dissolution in 1922 . At its height, the Ottoman Empire spanned an area from Hungary in the north to Yemen in the south, and from Algeria in the west to Iraq in the east . Administered at first from the city of Bursa, the empire's capital was moved to Edirne in 1363 following its conquest by Murad I, and then to Constantinople (present - day Istanbul) in 1453 following its conquest by Mehmed II . </P> <P> The Ottoman Empire's early years have been the subject of varying narratives due to the difficulty of discerning fact from legend . The empire came into existence at the end of the thirteenth century, and its first ruler (and the namesake of the Empire) was Osman I . According to later, often unreliable Ottoman tradition, Osman was a descendant of the Kayı tribe of the Oghuz Turks . The eponymous Ottoman dynasty he founded endured for six centuries through the reigns of 36 sultans . The Ottoman Empire disappeared as a result of the defeat of the Central Powers with whom it had allied itself during World War I . The partitioning of the Empire by the victorious Allies and the ensuing Turkish War of Independence led to the abolition of the sultanate in 1922 and the birth of the modern Republic of Turkey in 1922 . </P> <P> The Ottoman Empire was an absolute monarchy during much of its existence . By the second half of the fifteenth century, the sultan sat at the apex of a hierarchical system and acted in political, military, judicial, social, and religious capacities under a variety of titles . He was theoretically responsible only to God and God's law (the Islamic شریعت ‎ şeriat, known in Arabic as شريعة sharia), of which he was the chief executor . His heavenly mandate was reflected in Islamic titles such as "shadow of God on Earth" (ظل الله في العالم ‎ ẓıll Allāh fī'l - ʿalem) and "caliph of the face of the earth" (خلیفه روی زمین ‎ Ḫalife - i rū - yi zemīn). All offices were filled by his authority, and every law was issued by him in the form of a decree called firman (فرمان ‎). He was the supreme military commander and had the official title to all land . Osman (died 1323 / 4) son of Ertuğrul was the first ruler of the Ottoman state, which during his reign constituted a small principality (beylik) in the region of Bithynia on the frontier of the Byzantine Empire . </P> <P> After the conquest of Constantinople in 1453 by Mehmed II, Ottoman sultans came to regard themselves as the successors of the Roman Empire, hence their occasional use of the titles Caesar (قیصر ‎ Qayser) of Rûm, and emperor, as well as the caliph of Islam . Newly enthroned Ottoman rulers were girded with the Sword of Osman, an important ceremony that served as the equivalent of European monarchs' coronation . A non-girded sultan was not eligible to have his children included in the line of succession . </P>

How did the sultan ruled the ottoman empire
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