The convent and church of St. Clare was founded on the site in 1280s. It was to be one of the very first convents to be dissolved during the Swedish Reformation. Gustav Vasa had the church and convent torn down in 1527.
The new Lutheran church, built under the order of King John III in 1572, is a cruciform shaped. It has the second highest tower in Scandinavia, over one hundred metres high. The interior contains a fine altarpiece and pulpit, both made in the mid-18th century.
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.