Saint Paul lived on in his Epistles and in Christian hagiography. In terms of the latter, apart from being paired with Peter in the tradition of Rome, his veneration was surprisingly subdued compared with that of his supposed convert Thecla. On the other hand, the reception of his letters led to heated controversies in Early Christianity. In the Latin Middle Ages, the Epistles characterized the thirteenth Apostle as the exemplary professor of systematic theology, and his writings provided the basic vocabulary for the revolutionary theology of the magisterial Reformers in the 16th century.