Absalon, the Danish bishop, had a brick church built on the site of Harald's church in 1170.Today's cathedral was completed in 1275 after five of Absalon's successors had contributed to its construction.The Reformation brought Roskilde's development to an abrupt stop.
Roskilde, which developed as the hub of the Viking land and sea trade routes over a thousand years ago, is one of Denmark's oldest cities.From the 11th century until 1443, it was the capital of Denmark.The Risø research facility is also becoming a major employer, extending interest in sustainable energy to the clean technology sphere.The local university, founded in 1972, the historic Cathedral School, and the Danish Meat Trade College, established in 1964, are educational institutions of note.It is not clear when Roskilde became a market town but it was certainly enjoying trading privileges under King Eric II who reigned from 1134 to 1137.
These privileges were firmly established when the Roskilde City Council granted market town status to other towns on Zealand on 15 June 1268.
According to Adam of Bremen and the Saxo Grammaticus, Roskilde was founded in the 980s by Harald Bluetooth.
On high ground above the harbour, he built a wooden church consecrated to the Holy Trinity as well as a royal residence nearby.
For the next three centuries, the city suffered a series of disasters including the effects of the Dano-Swedish War which terminated with the Treaty of Roskilde in 1658, With the development of the rail network, Roskilde became an important hub for traffic with Copenhagen.
In the 1870s and 1880s, the harbour was extended attracting industrial firms to the area.
the city is a business and educational centre for the region and the 10th largest city in Denmark.