Along the ancient via Mercatorum that climbed from Olmo to the San Marco Pass, on a meadowy and scenic spur in the hamlet of Redivo di Averara, where the Venetian Vicar had his seat for centuries, there arose since the 13th century an oratory dedicated to St. Pantaleon, the medical saint from Nicomedia in Bithynia, protector against disease. The feast has been celebrated ever since, still today, on July 27.
The ancient building was rebuilt in the 15th century in the local Romanesque-Gothic style, with a simple hall and square presbytery, adorned on the walls and facades with frescoes of which fragments can still be seen, and with a slender bell tower that from the single to the triple lancet windows gives a sense of momentum. On the bell tower are the oldest bells in the Valley, dating from 1496 and 1502, joined since 1954 by a third.
The church was consecrated in 1488 by the Milanese archbishop Rolando dei conti di Rovellasca.
In the second half of the 17th century it was lengthened and raised as in the present situation. Inside, in the solemn marble altarpiece on the chancel is the beautiful canvas by Andrea Michieli known as il Vicentino (1567-1617), a disciple of Tintoretto, depicting Saint Pantaleon with Saints Francis and Charles.
Important carving and inlay work is the chancel choir, signed and dated by the author Pietro Milesi, in 1706. From 1800 is the fresco on the chancel vault depicting the Beheading of St. Pantaleon.
