People have lived in the current Narsaq area for thousands of years, but not continuously. Remains of the Norse settlement can be found in the area. The church ruins of Dyrnes can be found on the north-western outskirts of the town. The Landnám homestead, Landnamsgaarden, can be found immediately to the west of the town. Dated to the year 1000, the homestead is among the oldest of the Norse ruins in the area. The wider Narsaq area has some of the most striking Norse artefacts and ruins. Erik the Red's Brattahlid is located in present-day Qassiarsuk, and the Gardar bishop seat is in present-day Igaliku.
Present day Narsaq was founded as Nordprøven ('North Prøven') in 1830, distinguishing it from Sydprøven established the same year. The initial settlement was founded as a trading colony of Qaqortoq, then named Julianehaab.
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.