The parish church is devoted to Saint Lawrence the Martyr and dates back to the 15th century. It is divided in three naves and is characterised by a tall, imposing bell tower, begun during the 16th century and completed in the 18th century using materials originating from the Fieschi castle. The church was restored during the 18th century, so much so that the original entrance was closed and a new one was opened on the opposite side, where, formerly, the apsis was. The church hosts the tomb of Bernardino Galliari, the renowned Scala stage designer who was born in Andorno, and some of his paintings, as well as a precious 13th-century marble holy water stoup.