Saint-Pient Church in Autigny la Tour

This statue most likely represents Saint Martin of Tours, one of the most popular saints in Christianity.

Clues that help identify him:

The horse: Saint Martin is often depicted on horseback, as he was a Roman soldier before becoming a Christian.
The gesture of sharing: On many statues and images, he is depicted cutting off his cloak to give it to a poor person, although this gesture is not clearly visible here.