The impressive church of Tensta is one of the oldest brick churches in Uppland. The oldest parts originate from the late 13th century. The sacristy and porch were built during the next century and arches between 1420-30.
There are many fine medieval frescoes in the church. These are signed by the painter Johannes Rosenrod in 1437. They depict various religious themes including scenes from the life of St. Birgitta. The altar was made by Bernt Notke workshop in Lübeck in 1480’s. The pulpit dates from 1749. Outside the church stands also a runestone.
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.