While the oldest parts of Havdhem Church have been identified as being from the first half of the 12th century, graves dating from the period of the arrival of Christendom to Gotland (11th century) have been discovered in the cemetery. The choir is the oldest part of the church itself. It shows resemblances with the churches of Garde and Källunge. The choir portal is however later, from the 13th century. The nave dates from circa 1200 but was originally both lower and somewhat shorter. It was possibly enlarged in 1580, following a fire that devastated the church. The apse was added to the choir at approximately the same time as the nave was built. It displays similarities with a now ruined church in Visby, St. Drotten. The church tower dates from the middle of the 13th century and was originally slightly higher. It replaced an earlier, smaller tower.
Internally, the apse retains a few fragments of frescos displaying Byzantine influences. The altarpiece dates from 1667 and the pulpit from 1679, while the baptismal font is from 1685. The triumphal cross is a work from the 15th century.
References:Saint-Georges de Boscherville Abbey is a former Benedictine abbey. It was founded in about 1113 by Guillaume de Tancarville on the site of an earlier establishment of secular canons and settled by monks from the Abbey of Saint-Evroul. The abbey church made of Caumont stone was erected from 1113 to 1140. The Norman builders aimed to have very well-lit naves and they did this by means of tall, large windows, initially made possible by a wooden ceiling, which prevented uplift, although this was replaced by a Gothic vault in the 13th century. The chapter room was built after the abbey church and dates from the last quarter of the 12th century.
The arrival of the Maurist monks in 1659, after the disasters of the Wars of Religion, helped to get the abbey back on a firmer spiritual, architectural and economic footing. They erected a large monastic building one wing of which fitted tightly around the chapter house (which was otherwise left as it was).