Transformation of the Ottoman Empire
Sultan Suleiman I (r. 1520–1566) was the longest-reigning sultan in Ottoman history, but the last years of his reign were characterized by uncertainty over who would be his successor. Suleiman had three sons who could hope to succeed, Mustafa, Bayezid, and Selim. While the latter two were the children of Suleiman's wife Hurrem Sultan, the first was the son of an earlier concubine. Mustafa may have felt that his half-brothers possessed an unfair advantage over him, and thus worked to secure the favor of the military. Perhaps suspecting that Mustafa planned to dethrone him just as his own father had done to his grandfather, Suleiman acted first and in 1553 ordered that Mustafa be executed. The death of Hurrem Sultan in 1558 triggered open conflict between the two remaining candidates, and Selim ultimately emerged victorious. Suleiman further strengthened his son's position by arranging a marriage between Selim's daughter and the influential Sokollu Mehmed Pasha (Grand Vizier 1565–1579). Suleiman died in 1566, while besieging the fortress of Szigetvar in Hungary, bringing Selim to the throne.
Haseki sultan
Hürrem, the first imperial consort who became haseki sultan, was given several special rights during her tenure, especially after the death of Suleiman's mother, Hafsa Sultan, the first valide sultan, in 1534. Hürrem was allowed to give birth to more than one son, which was a stark violation of the old imperial harem principle of “one concubine mother — one son” that was designed to prevent both the mother's influence over the sultan and the feuds of the blood brothers for the throne. In 1533 or 1534 (the exact date is unknown), Suleiman married Hürrem in a magnificent formal ceremony, making him the first Ottoman Sultan to wed since Orhan Ghazi (reign 1326–1362), and violating a 200-year-old custom of the Ottoman imperial house according to which sultans were not to marry their concubines. Later, Hürrem became the first prince's mother to remain in the Sultan's court for the duration of her life. In the Ottoman imperial family tradition, a sultan's consort was to remain in the harem only until her son came of age (around 16 or 17), after which he would be sent away from the capital, accompanied by his mother, to govern a faraway province. Hürrem became Suleiman's partner not only in household, but also in state affairs. Thanks to her intelligence, she acted as Suleiman's chief adviser, and she seems to have had an influence upon foreign policy and international politics. Hürrem's great power signaled the rise of the chief imperial consort under the title of haseki.