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Ottoman period

What started as irregular attacks in 1517 were finalized in 1538, when Ottoman Sultan Suleiman the Magnificent added Mosul to his empire by capturing it from his archrival, Safavid Persia. Thenceforth Mosul was governed by a pasha. Mosul was celebrated for its line of walls, comprising seven gates with large towers, a renowned hospital (maristan) and a covered market (qaysariyya), and its fabrics and flourishing trades.

Mesopotamia had been acquired by the Ottoman Empire in 1555 by the Peace of Amasya, but until the Treaty of Zuhab in 1639 Ottoman control over Mesopotamia was not decisive. After the Peace of Amasya, the Safavids recaptured most of Mesopotamia one more time during the reign of king Abbas I (r. 1588–1629). Among the newly appointed Safavid governors of Mesopotamia during those years was Qasem Sultan Afshar, who was appointed governor of Mosul in 1622. Before 1638, the Ottomans considered Mosul "still a mere fortress, important for its strategic position as an offensive platform for Ottoman campaigns into Iraq, as well as a defensive stronghold and staging post guarding the approaches to Anatolia and to the Syrian coast. Then, with the Ottoman reconquest of Baghdad (1638), the liwa of Mosul became an independent wilaya."

Despite being a part of the Ottoman Empire, during the four centuries of Ottoman rule Mosul was considered "the most independent district" within the Middle East, following the Roman model of indirect rule through local notables. "Mosuli culture developed less along Ottoman–Turkish lines than along Iraqi–Arab lines; and Turkish, the official language of the State, was certainly not the dominant language in the province."

In line with its status as a politically stable trade route between the Mediterranean and the Persian Gulf, Mosul developed considerably during the 17th and early 18th centuries. Like the development of the Mamluk dynasty in Baghdad, during this time "the Jalili family was establishing itself as the undisputed master of Mosul" and "helping to connect Mosul with a pre-Ottoman, pre- Turcoman, pre- Mongol, Arab cultural heritage that was to put the town on its way to recapturing some of the prestige and prominence it had enjoyed under the golden reign of Badr ad-Din Lu’lu’."

Along with the al-Umari and Tasin al-Mufti families, the Jalilis formed an "urban-based small and medium gentry and a new landed elite", which proceeded to displace the control of previous rural tribes. Such families establish themselves through private enterprise, solidifying their influence and assets through rents on land and taxes on manufacturing.

As well as by elected officials, Mosul's social architecture was highly influenced by the Dominican fathers who arrived in Mosul in 1750, sent by Pope Benedict XIV (Mosul had a large Christian population, predominantly indigenous Assyrians). In 1873 they were followed by the Dominican nuns, who established schools, health clinics, a printing press, an orphanage, and workshops to teach girls sewing and embroidery. A congregation of Dominican sisters founded in the 19th century still had its motherhouse in Mosul in the early 21st century. Over 120 Assyrian Iraqi Sisters belonged to this congregation.

In the 19th century the Ottoman government started to reclaim central control over its outlying provinces. Their aim was to "restore Ottoman law, and rejuvenate the military" and to revive "a secure tax base for the government". In order to reestablish rule, in 1834 the sultan abolished public elections for governor, and began "neutraliz local families such as the Jalilis and their class" and appointing new, non-Maslawi governors directly. In line with its reintegration within central government rule, Mosul was required to conform to new Ottoman reform legislation, including the standardization of tariff rates, the consolidation of internal taxes and the integration of the administrative apparatus with the central government.

This process started in 1834 with the appointment of Bayraktar Mehmed Pasha, who was to rule Mosul for the next four years. After his reign, the Ottoman government (wishing still to restrain the influence of powerful local families) appointed a series of governors in rapid succession, ruling "for only a brief period before being sent somewhere else to govern, making it impossible for any of them to achieve a substantial local power base." Mosul's importance as a trading center declined after the opening of the Suez Canal, which enabled goods to travel to and from India by sea rather than by land through Mosul.

Mosul was the capital of Mosul Vilayet, one of the three vilayets (provinces) of Ottoman Iraq, with a brief break in 1623, when Persia seized the city.