submission to the Ottomans. In 1423, Despot Andronikos Palaiologos ceded it to the Republic of Venice with the hope that it could be protected from the Ottomans who were besieging the city. The Venetians held Thessaloniki until it was captured by the Ottoman Sultan Murad II on 29 March 1430. Ottoman period When Sultan Murad II captured Thessaloniki and sacked it in 1430, contemporary reports estimated that about one-fifth of the city's population was enslaved. Ottoman artillery was used to secure the city's capture and bypass its double walls. Upon the conquest of Thessaloniki, some of its inhabitants escaped, including intellectuals such as Theodorus Gaza "Thessalonicensis" and Andronicus Callistus. However, the change of sovereignty from the Byzantine Empire to the Ottoman one did not affect the city's prestige as a major imperial city and trading hub. Thessaloniki and Smyrna, although smaller in size than Constantinople, were the Ottoman Empire's most important trading hubs. Thessaloniki's importance was mostly in the field of shipping, but also in manufacturing, while most of the city's trade was controlled by Jewish people. During the Ottoman period, the city's population of Ottoman Muslims (including those of Turkish origin, as well as Albanian Muslim, Bulgarian Muslim, especially the Pomaks and Greek Muslim of convert origin) and Muslim Roma like the Sepečides Romani grew substantially. According to the 1478 census Selânik (), as the city came to be known in Ottoman Turkish, had 6,094 Christian Orthodox households, 4,320 Muslim ones, and some Catholic. No Jews were recorded in the census suggesting that the subsequent influx of Jewish population was not linked to the already existing Romaniots community. Soon after the turn of the 15th to 16th century, however, nearly 20,000 Sephardic Jews immigrated to Greece from the Iberian Peninsula following their expulsion from Spain by the 1492 Alhambra Decree. By c. 1500, the number of households had grown to 7,986 Christian ones, 8,575 Muslim ones, and 3,770 Jewish. By 1519, Sephardic Jewish households numbered 15,715, 54% of the city's population. Some historians consider the Ottoman regime's invitation to Jewish settlement was a strategy to prevent the Christian population from dominating the city. The city became both the largest Jewish city in the world and the only Jewish majority city in the world in the 16th century. As a result, Thessaloniki attracted persecuted Jews from all over the world. Thessaloniki was the capital of the Sanjak of Selanik within