Santissima Trinità, Catholic church in Chioggia, Italy.

Santissima Trinità is a church in Chioggia with a Greek cross floor plan and a stone exterior, with multiple chapels positioned along its interior walls. The space is organized to guide worshippers and visitors through the various devotional areas.

A wooden church stood here from 1528 and was replaced by a masonry building between 1555 and 1559. The church became unsafe at the end of the 17th century and was rebuilt to a design by Andrea Tirali, completed in 1707; the side altars took about twenty-five more years. Antonio Rosmini was ordained priest here in 1821.

The brotherhood was known locally as the Confraternita dei Rossi, after the red habit its members wore. Founded by fra Paolo Barbieri and officially instituted in 1528 by Bishop Bernardino Venier, it joined the Archconfraternity of the Holy Trinity in Rome on 18 December 1578. Members practised flagellation each Sunday during the litanies, an obligation relaxed in 1580, when women and boys over 15 could also enrol.

The complex stands in Chioggia's centre beside the fondaco delle Farine, with the church to the north and the oratory continuing to the south. Its small bell tower, rebuilt in 1634, is largely hidden by the church and the bell tower of the nearby Basilica di San Giacomo Apostolo. Enter from the piazza side and look up at the facade cross dated 1704.

The facade relief above the entrance carries the motto "Con questo segno vincerai" and the year 1704, flanked by two brothers holding the scourge used in self-flagellation. The small bell tower behind the church was rebuilt in 1634 and is largely hidden by the neighbouring Basilica di San Giacomo Apostolo.