According to the "Chronicle of Edessa", a Syriac chronicle written after 540, the cathedral church of Edessa was founded immediately after the end of the Diocletianic Persecution and the 313 "Letter of Licinius", which ended the general persecution of Christians in the Roman Empire. The cathedral church was dedicated to the Holy Wisdom. Around 23 different monasteries and churches are known to have existed in the city, with at least as many again just outside town; these attracted many pilgrims. Eusebius of Caesarea even claimed in his "Church History" that "the whole city" was "devoted to the name of Christ" in the early 4th century; in fact the city had at least some pagan inhabitants into the early 5th century, as well as Jewish ones.