In the 1519 census, the city numbered 393 Muslim households and 197 single (unmarried or widowed) Muslims, 42 Christian households and 14 single Christians, and 19 Jewish households and 5 single Jews, in total ca. 2,500 people. In the 1530 census, the 17 Turkish-named neighbourhoods ("mahalle") are mentioned, as well as the existence of one Friday mosque, 16 "masjids", 4 "zawiyas", 4 schools, and a single church (in the walled city). Nevertheless, the French traveller Pierre Bellon du Mans, who visited the city in 1548, stated that "the city is inhabited by a few Greeks and majority Turks". In the 1600s, the town was graced by new buildings—a small Friday mosque, a double bath, a "mekteb", a "madrasah", and an "imaret"—by the "defterdar" Ekmekcizade Ahmed Pasha, who sponsored numerous such works throughout Thrace. Ahmed's mosque, the Yeni Mosque, which survives to this day, is the only structure in Greece to feature Iznik tiles from the 1580s, the zenith of the Iznik potters' art. When the traveller Evliya Çelebi visited the town in 1667/8, he found "4,000 prosperous, stone-built houses"—likely an exaggeration—in 16 "mahalles", with 5 main mosques, 11 "masjids", 2 "imarets", 2 baths, 5 "madrasahs", 7 "mektebs", 17 caravanserais, and 400 shops.