Suleiman Shah I ibn Qutalmish (; ; ) founded an independent Seljuk Turkish state in Anatolia and ruled as Seljuk Sultan of Rûm from 1077 until his death in 1086.

Life
Suleiman was the son of Qutalmish, who had struggled unsuccessfully against his cousin Alp Arslan for the throne of the Great Seljuk Empire. When Qutalmish died in 1064, Suleiman fled with his three brothers into the Taurus Mountains and there sought refuge with Turkoman tribes living beyond the borders of the empire. Alp Arslan responded by launching a series of punitive expeditions against them. Of the four brothers, Suleiman alone with his brother Mansur survived the raids and was able to consolidate his leadership of the Turkomans living in the Taurus Mountains.

Founding his realm
According to the chronicler Al-Azimi, Suleiman captured Nicaea in 1075. Based on this date, some historians accepted that the Anatolian Seljuk State was founded on this date, and others between 1078-1081. Thereupon, sultan Malik-Shah I recognized him as a ruler of Rum, while the Abbasid caliph Al-Qa'im sent him a firman (edict) and a khalat for his success. There is no single record of him minting coins and delivering a khutbah (sermon) in his own name. For this reason, it can be said that he was still subject to the Great Seljuk Empire. As a matter of fact, there are clear statements in various sources about his subjection to Malik-Shah I.

In 1078, the Byzantine emperor Michael VII sought the help of Suleiman against Nicephorus Botaneiates, the commander of the Anatolic Theme, who had challenged the emperor for the throne. Suleiman intercepted Botaneiates' small force between Cotyaeum and Nicaea, whereupon the usurper persuaded Suleiman and Mansur to join his rebellion by offering him incentives superior to those of the emperor. Nicephorus' bid for power was successful, and in return for their support Suleiman's Turkmen were allowed to settle on the Asiatic side of the Bosphorus, near Constantinople itself. Two years later, Suleiman lent his support to another pretender, Nicephorus Melissenus. It was the latter Nicephorus who opened the gates of Nicaea to the Turkmen, allowing Suleiman to establish a permanent base. All Bithynia was soon under Suleiman's control, a circumstance which allowed him to restrict communication between Constantinople and the former Byzantine subjects in Anatolia.

In 1084, Suleiman left Nicaea, leaving his kinsman Abu'l Qasim in charge. That same year, he captured Antakya, massacred its inhabitants, seized the treasures of the church of St. Cassianus, and converted the church into a mosque. Following Suleiman's capture of Antakya, the Uqaylid Muslim ibn Quraysh demanded tribute. Suleiman refused, which was followed by border raids by both sides. In 1085, Muslim ibn Quraysh marched an army to besiege Antakya, Suleiman intercepted him and defeated Muslim after the latter's army suffered the defection of Turkmen under the command of Cubuk bey.

His death 
In 1086, Suleiman, seeking to expand his dominion, placed Aleppo under siege and demanded its surrender. The emir of Aleppo sent a message to Tutush I, the Seljuk ruler of Syria, stating he would hand the city over to him. Suleiman, hearing of the approach of Tutush's forces, raised the siege and marched to meet him. In the battle of Ain Salm near Aleppo, Suleiman attacked Tutush but his forces fled before Tutush's army under Artuk Bey and Suleiman was killed.

Malik-Shah marched to Antakya, where Suleiman's vizier surrendered both the city and Suleiman's son, Kilij Arslan I. Malik Shah transferred Kilij to Isfahan as a hostage.

Upon the death of Malik-Shah I, Kilij Arslan I re-established the Sultanate of Rûm.

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11th-century births
1086 deaths
Sultans of Rum
Byzantine–Seljuk wars
11th-century rulers
Founding monarchs