The meaning of in Bragora is uncertain. It could refer to a square (agora), a fishing site (bragolare: to fish), or a marshy area (brago) combined with a stagnant canal (gora). Tradition has it that the first church on this site was among the twelve churches founded by San Magno (St Magnus) in the 8th Century, but the earliest written record dates to 1090. This later church is said to have been built to house relics of St John the Baptist. Rebuilt again in 1178 and 1475. The current Gothic church is this latter 15th Century rebuilding. Restoration with baroque embellishments was carried out in 1728.