The church of Sant Andreu of the Castle of Tona is located next to the Castle of Tona, on a hill next to the village of Tona.
The first news that we have of this church is of the year 889, year in which it was consecrated.
This church is a Romanesque building from the 11th century, with a single nave and a semicircular apse. During the 13th century a chapel was built on the north façade, and in the 15th century another chapel was built next to the 13th century chapel. Probably during the seventeenth century was added the tower bell tower, quadrangular, with octagonal upper body.
The apse has double-spilled windows, with external ornamentation by lesenes and blind arches of the llobard type. This decoration can also be found in the rest of the building.
This building had parochial functions until it was decided to build a new church of Sant Andreu in the middle of the urban nucleus of Tona, during the 18th century.
During the 19th century, a military optical telegraphy tower was located on this hill. Some scholars affirm that this telegraphy tower was located in the bell tower of this church.