The medieval church in Källa is one of the best-preserved fortified churches in Sweden. It still has its original roof but the inner structure has not been preserved completely. The church building contains remains of a Romanesque church, probably built in the later part of the 12th century.

Källa Old Church and its surroundings constitute a very valuable cultural-historical environment. It is the most well-preserved example of the churches on Öland that have had both profane and ecclesiastical functions during the Middle Ages.