The church of San Bartolomeo, dating from the 10^th to the 12^th centuries, stands at the edge of the town of Villadossola, at the beginning of the road for the Antrona Valley.

Of the original Romanesque building, only the upper part of the side walls, the eastern side with the semicircular apse, and the bell tower remain. Inside the apse are some fragments of 15^th century frescoes and a wooden sculpture by the local artist Andrea Merzagora da Craveggia.

The church’s main historical and artistic attractions are the large number of petroglyphs carved into its stones. The most interesting of these are the rock carvings on the doorway – a central cross and two lateral Greek crosses, as well as sun symbols and serpentiform marks. The high concentration of these petroglyphs at a single site is evidence not only of the historic character of the place, but also the probability that there were prehistoric settlements here in ancient times.