Originally it consisted of a nave, chancel and an apse.

During the 15th century, the earlier ceiling was replaced with vaults.

A small southern transept was built in 1709, and in 1768 a large northern transept was constructed, to house the congregation which had grown because of the foundation of the nearby alum factory, an early example of industrialisation in Sweden.

With the new, large transept, the altar was moved to the southern transept, while the earlier nave was more or less destroyed during the rebuilding.

[1][2] The chancel still contains some late medieval murals from the second half of the 15th century.