Thaddeus of Edessa festival, and heard the preachings of John the Baptist (St. John the Forerunner). After being baptized by John the Baptist in the Jordan River, he remained in Palestine. He later met and became a follower of Jesus. He was chosen to be one of the seventy disciples, whom Jesus sent in pairs to preach in the cities and places. After Pentecost and the ascension of Jesus, Thaddeus started preaching the gospel in Mesopotamia, Syria and Persia. Thaddaeus ordained priests in Edessa, converted many to Christianity and built up the church there. He also went to Beirut to preach and founded
John the Baptist (Caravaggio) as an adult, frequently in the act of baptising Jesus. Nevertheless, it was not totally without precedent. Leonardo had painted a youthful and enigmatically smiling Baptist with one finger pointing upwards and the other hand seeming to indicate his own breast, while Andrea del Sarto left a Baptist which almost totally prefigures Caravaggio. Both Leonardo and del Sarto had created from the figure of John something which seems to hint at an entirely personal meaning, one not accessible to the viewer, and Caravaggio was to turn this into something like a personal icon in the course of his many variations