Sandby Church dates from the middle of the 13th century and it has a Romanesque chancel and nave and a Late Gothic tower. Little is known of the church's early history other than the Crown had clerical appointment rights before the Reformation. It remained under the Crown until 1679 when it was transferred to the episcopal authority of Funen. In 1726, it passed into the ownership of the Danneskiold-Samsøe til Lundegaard estate, later the seat of the Barony of Christiansdal under the Knuth dynasty. After the termination of the barony in 1804, the church was bought by the Hardenberg estate until it gained independence in 1912.
The church is built of red brick, now whitewashed, and has a red tile roof. In addition to the Romanesque chancel and nave, there was originally also an apse. The tower, porch and sacristy were added in the Late Gothic period. Toothed cornice decorations top the walls of the nave and chancel where traces of former rounded Romanesque windows and doors can still be seen.
The auricular Baroque altarpiece (originally an epitaph) and the pulpit and canopy, both from c. 1635, are probably the work of Hans Gudewerth the Younger (died 1671). Both finely decorated pieces have been carved with unusual skill. The pulpit has images of the Fall, Noah's Ark, the Resurrection and the Ascension of Jesus. The granite font is Romanesque. There is a bell from the Middle Ages and one cast in 1567. Late Gothic frescos have been uncovered on the segments of the sacristy vaults, probably representing the early fathers of the church. Pope Gregory with a green halo is depicted in the eastern segment while Jerome in his red cardinal's robes and hat can be seen in the northern segment.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.