mosque, a closed marketplace, a public bath, a hostel, and of course the governor's castle ("Saray") which gave the city its present name. The mosque was named "Careva Džamija" (the Emperor's Mosque) in honor of Sultan Mehmed II. With the improvements, Sarajevo quickly grew into the largest city in the region. By the 15th century the settlement was established as a city, named Bosna-Saraj, around the citadel in 1461. Following the expulsion of Jews from Spain at the end of the 15th century, and the invitation from the Ottoman Empire to resettle their population, Sephardic Jews arrived in Sarajevo, which over time would become a leading center of Sephardic culture and the Ladino language. Though relatively small in size, a Jewish quarter would develop over several blocks in Baščaršija. Many local Christians converted to Islam at this time. To accommodate the new pilgrims on the road to Mecca, in 1541, Gazi Husrev-beg's quartermaster Vekil-Harrach built a Pilgrim's mosque for which it is still known to this day as the Hadžijska Mosque. Under leaders such as the second governor Gazi Husrev-beg, Sarajevo grew at a rapid rate. Husrev-beg greatly shaped the physical city, as most of what is now the Old Town was built during his reign. Sarajevo became known for its large marketplace and numerous mosques, which by the middle of the 16th century numbered more than 100. At the peak of the empire, Sarajevo was the biggest and most important Ottoman city in the Balkans after Istanbul. By 1660, the population of Sarajevo was estimated to be over 80,000. By contrast, Belgrade in 1683 had 100,000, and Zagreb as late as 1851 had 14,000 people. As political conditions changed, Sarajevo became the site of warfare. In 1697, during the Great Turkish War, a raid was led by Prince Eugene of Savoy of the Habsburg monarchy against the Ottoman Empire, which conquered Sarajevo and left it plague-infected and burned to the ground. After his men had looted thoroughly, they set the city on fire and destroyed nearly all of it in one day. Only a handful of neighborhoods, some mosques, and an Orthodox church, were left standing. Numerous other fires weakened the city, which was later rebuilt but never fully recovered from the destruction. By 1807, it had only some 60,000 residents. In the 1830s, several battles of the Bosnian uprising had taken place around the city. These had been