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 John the Baptist John the Baptist ( "Yokhanan HaMatbil", , "Iōánnēs ho baptistḗs" or Ἰωάννης ὁ βαπτίζων, "Iōánnēs ho baptízōn", , ; Late 1st century BC – 28–36 AD) was a Jewish itinerant preacher in the early first century AD. John is revered as a major religious figure in Christianity, Islam, the Bahá'í Faith, and Mandaeism. He is called a prophet by all of these faiths, and is honored as a saint in many Christian traditions. Other titles for John include John the Forerunner in Eastern Christianity and "the prophet John" ("Yaḥyā") in Islam. To clarify the meaning of "Baptist",