Ottoman Ayan
The Ottoman ayan (singlular: ayn) were local notables or dynasts that maintained different extents of administrative control over swaths of land in the Ottoman Empire from the 16th to the early 19th centuries. These dynasts held significant autonomy from the central Ottoman government but did not challenge the state. Though the title could only be earned by Muslims, their leadership was secular. This elite class consisted of, “Wealthy merchants, heads of Janissary garrisons, leaders of important craft guilds, those who had bought the right to collect taxes for the government in Istanbul, and those who supervised the distributions of wealth generated by, and the maintenance of, pious endowments.” Ultimately, their presence was a part of a greater decentralizing trend experienced in the Ottoman Empire beginning in the 16th century, one which would come to define the Empire’s structure until its fall in the early 20th century.
Turkey
The Ottoman Empire's power and prestige peaked in the 16th and 17th centuries, particularly during the reign of Suleiman the Magnificent, who personally instituted major legislative changes relating to society, education, taxation and criminal law. The empire was often at odds with the Holy Roman Empire in its steady advance towards Central Europe through the Balkans and the southern part of the Polish-Lithuanian Commonwealth. At sea, the Ottoman Navy contended with several Holy Leagues, such as those in 1538, 1571, 1684 and 1717 (composed primarily of Habsburg Spain, the Republic of Genoa, the Republic of Venice, the Knights of St. John, the Papal States, the Grand Duchy of Tuscany and the Duchy of Savoy), for the control of the Mediterranean Sea. In the east, the Ottomans were often at war with Safavid Persia over conflicts stemming from territorial disputes or religious differences between the 16th and 18th centuries. The Ottoman wars with Persia continued as the Zand, Afsharid, and Qajar dynasties succeeded the Safavids in Iran, until the first half of the 19th century. Even further east, there was an extension of the Habsburg-Ottoman conflict, in that the Ottomans also had to send soldiers to their farthest and easternmost vassal and territory, the Sultanate of Aceh in Southeast Asia, to defend it from European colonizers as well as the Latino invaders that had crossed from Latin-America and had Christianized formerly Muslim-dominated Philippines. From the 16th to the early 20th centuries, the Ottoman Empire also fought many wars with the Russian Tsardom and Empire. These were initially about Ottoman territorial expansion and consolidation in southeastern and eastern Europe; but starting from the latter half of the 18th century, they became more about the survival of the Ottoman Empire, which had begun to lose its strategic territories on the northern Black Sea coast to the advancing Russians.