Standing on the crossroads of main trade routes in Asia Minor, the area was a centre of importance for Greeks, with Armenian majority and minorities like Syriac Christians, Jews, Assyrians and other. From the mid 3rd century AD and afterwards, the territory was dominated by and incorporated into the Sasanian Empire, although it occasionally briefly fell under the rule of the neighboring Byzantine Empire as well. From the mid 7th century AD, the Arabs frequently clashed with the Byzantine Empire, including over the region Between the seventh and eight centuries Arabs and Byzantines alternately held the region in their power, local Armenian rulers played a significant role in these events. The city (present day Erzurum) was alternatively held by the Arabs and Byzantines during the 7-10th centuries it was also part of the Georgian kingdom of Tao-Klarjeti in the 10th century. Threatened and later devastated and looted by the Seljuk Turks in 1049, the old city of Erzen was conquered, but Theodosiopolis survived the invasion until it was captured some time later. From the year 1101 onward it is documented that the ruling dynasty of the Saltukids held the town and much of the surrounding area in their power. Theodosiopolis repelled many attacks and military campaigns by the Seljuks of Rum and Georgians (the latter knew the city as Karnu-Kalaki) until 1201 when the city and province were conquered by the Seljuk sultan Süleiman II of Rüm. Erzen-Erzurum fell to the Mongol siege in 1242, and the city was looted and devastated. After the fall of the Seljuk Sultanate of Anatolia (Rum) in the early 14th century, it became an administrative province of the Ilkhanates, and after their fall, became part of the Çoban beylik, Black Sheep Turkmen, Mongols led by Timur Lenk, the White Sheep Turkmen and the rising Iranian Safavids captured the town in 1502 from the Aq Qoyunlu. In the Ottoman Empire In 1514, the region was conquered by the Ottoman Sultan Selim I following the Battle of Chaldiran. During the Ottoman reign, the city Erzurum served as the main base of Ottoman military power in the region and as the capital of the province. Early in the 17th century, the province was threatened again and taken by Safavid Iran while enduring also a revolt by the province governor Abaza Mehmed Pasha. This revolt was combined with Jelali Revolts (the uprising of the provincial musketeers called the