San Sebastiano is the church of the hamlet of Comasira. The primitive structure is datable to the first half of the fifteenth century due to the architectural forms of the small portal, the low roof of the apse with its characteristic barrel vault and the presence of late Gothic frescoes.
The presbytery has a cycle of 16th century frescoes depicting Saints Sebastian and Lawrence, which in turn cover those dating back to the previous century, preserved only in the sacristy and in small portions along the nave and on the triumphal arch.
A unique example in the territory of Lecco, a pewter container held a glass ampoule and a gold reliquary worked in damascening with the figures of the crucifixion and Saints Nicholas and Maurice, dating from the late twelfth century. This discovery suggests that the construction of the Gothic temple was based on a pre-existing Romanesque structure, which was probably lost in to a natural disaster. This hypothesis is further reinforced by the oral tradition that explains the isolated position of the church, upstream from the village, since the upper part of the latter was destroyed by a landslide.
