The Groote Kerk of St. James (15th and 16th centuries) has a fine vaulted interior, and contains some old stained glass, a carved wooden pulpit (1550), a large organ and interesting sepulchral monuments, and some escutcheons of the knights of the Golden Fleece, placed here after the chapter of 1456.
It is remarkable for its fine tower and chime of bells, and contains the cenotaph monument of Jacob van Wassenaer Obdam, designed by Cornelis Moninckx and sculpted by Bartholomeus Eggers in 1667, and the renaissance tomb of Gerrit van Assendelft (1487 - 1558).
The church's six-sided tower is one of the tallest in the Netherlands. There are 34 panels with shields and names of knights of the golden fleece. The mechanical clock has 15 bells by M. de Haze in 1686, one by Jasper and Jan Moer from 1541, one from H. Van Trier from 1570, one by Coenraat Wegewaert from 1647, and one from C. Fremy from 1692 and 31 modern bells. In the church tower there is an automatic carillon by Libertus van den Burgh, from 1689.
The church endured a fire in 1539, and the stained glass windows were repaired by leading glass artists, including the brothers Dirk and Wouter Crabeth of Gouda. Charles V, Holy Roman Emperor, who visited the church after the fire, sponsored two windows by the Crabeth's that due to their royal origin are the only two windows that have survived up to the present day. Under one of these windows lies a commemorative stone from 1857 for Constantijn and Christiaan Huygens, who were buried in unmarked graves in the choir of the church.
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.