Wat Tonson is located on the west bank of the Chao PhrayaRiver opposite AngThongTechnicalCollege. Wat Tonson is an ancient temple housing Somdet Phra Si Mueangthong, a very beautiful seated Buddha image in the posture of subduing Mara with the lap size of about 14 meters wide and 19 meters high molded in metal and gilded. Wat Tonsons abbot, Phra Ratchasuwanmalee, started the construction in 1973. Her Royal Highness, Princess Maha Chakri Sirindhorn performed a ceremony to complete the construction on March 7, 1985. This is regarded as the one of the largest metal molded Buddha images with beautiful posture.