When it comes to the cityscape, 16th century sources mention eight Friday mosques, three public libraries, numerous schools, 12 churches, three synagogues, and the largest bedesten (market) of the Balkans. Additionally, there were fountains and ''hammams'' (bathhouses). Most prominent churches such as Saint Sofia and Saint George were converted into mosques, and a number of new ones were constructed, including Banya Bashi Mosque built by the renowned Ottoman architect Mimar Sinan. In total there were 11 big and over 100 small mosques by the 17th century. In 1610 the Vatican established the See of Sofia for Catholics of Rumelia, which existed until 1715 when most Catholics had emigrated.