The oldest part of the Spånga Church origins from the time period 1175-1200. Large reconstructions and enhancements took place during the 14th century and the 15th century. Baron Gustaf Bonde (1620-1667), owner of the nearby Hässelby castle, made considerable donations to the church. After his death a grave choir, drawn by the architect Nicodemus Tessin the Elder, was attached as a continuation of the church, in which he and his descendants are buried. The church was latest renovated 1953–1955.
The church also contains other historical monuments, such as several fresco paintings from the Middle Ages. The first church paintings are probably from the 14th century, when the long nave was built. These were mostly abstract decorations, geometrical patterns and ornaments. Paintings from the early 15th century are interpreted as biblical motives from the Old Testament, the prophets Elijah and Elisha, but with landscape, houses, clothing and tools common at the time of painting.
There is a granite rune stone, dated from the Viking era, standing outside the church. On one side the stone has an runic inscription within bands with an interior Christian cross design, and on the other side it has a second cross. It is classified as being carved in runestone style RAK, which is the oldest style.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.