It was the center of several revolts against ruling Byzantine emperors- in 1182, led by John Komnenos Vatatzes, and 1188–1205 or 1206, led by Theodore Mangaphas, a local Philadelphian, against Isaac II Angelos. At that time, the bishopric of Philadelphia was promoted to metropolis. In the 14th century, Philadelphia was made the metropolis of Lydia by the Greek Orthodox patriarch of Constantinople, a status it still holds. It was granted this honor because the city did not capitulate to the Ottomans. The city was prosperous especially in the 13th and 14th centuries; there was a Genoese trading colony and the city was an important producer of leather goods and red-dyed silk (whence, perhaps, its Turkish name, which probably means "red city"). By the 14th century, the city was surrounded by Turkish emirates but maintained nominal allegiance to the Byzantine emperor. The town remained prosperous through trade and its strategic location.