The patron of Trebaseleghe is the Nativity of the Blessed Virgin Mary, celebrated on 8 September.
Since 1185, the Antica fiera dei mussi has been held annually on 7 September. Strategically located, in the Middle Ages the town was repeatedly devastated by the wars that bloodied the Treviso area until the arrival of the Venetian Republic. The town holds the Church of Sant'Ambrogio and the Church of Silvelle, as well as the Mulino Bonotto.