A decree, issued probably by Mengu-Timur, allowing the Franciscans to proselytize, was renewed by Öz Beg in 1314. Öz Beg allowed the Christian Genoese to settle in Crimea after his accession, but the Mongols sacked their outpost Sudak in 1322 when the Genoese clashed with the Turks. The Genoese merchants in the other towns were not molested. Pope John XXII requested Öz Beg to restore Roman Catholic churches destroyed in the region. Öz Beg signed a new trade treaty with the Genoese in 1339 and allowed them to rebuild the walls of Caffa. In 1332 he allowed the Venetians to establish a colony at Tanais on the Don. In 1333, when Ibn Battuta visited Sudak, he found the population to be predominantly Turkish.