The baptismal font was built after 1516 on the foundations of a previous church dedicated to St. Martin.
Remodeled many times, also due to the two earthquakes of 1873 and 1936, it has housed the ancient baptismal font since 1555, for which it has been the Baptistery of the nearby Cathedral for centuries. In 1970 it underwent extensive renovations, which erased its main architectural features created at the end of the 19th century.
After the earthquake of 1873, which led to the demolition of the nearby church of St. Andrew, it hosts the 14th-century Madonna delle Grazie, while its numerous ex-voto tablets (from the 15th to the 19th century) are preserved in the Civic Museum.
The restoration of the historic structure, under the protection of the Superintendency, aimed to remember and reproduce the decorative elements created at the end of the 19th century on the south and west facades, “marking” on the plaster, with a nail, the perimeter of the bands and decorative elements that were easily visible in the photographic documentation of the church after the earthquake of 1873. These parts have received a light wash of light brick color. The stone parts (window sills, edges) and the bas-reliefs above the main door (the Baptism of Christ by the Bellunese Giovanni Giacobini) have also been restored, as well as the two small bell towers on the south front and all the metalwork parts.
Inside, crowning the large baptismal basin, there is a small St. John the Baptist by Andrea Brustolon (1662-1732).
