Vivaldi started playing the violin in his early years. He started studying to become a priest when he was 15 and was ordained in 1703 at the age of 25. In September 1703 Vivaldi became a violin teacher at an orphanage where he started writing concertos and sacred vocal music for the oprhans. Later o... More informationn he became responsible for all the musical activity of the institution. Around 1717 Vivaldi was offered a new position as Maestro di Cappella (in charge of music in a chapel) of the governor of Mantua. During this period Vivaldi wrote his famous four violin concertos the Four seasons.Less information