Original sentence: Nidaros Cathedral and Archbishop's Palace are located side by side, in the middle of historic Trondheim.The large cathedral, built from 1070 on, is the most important Gothic monument in Norway and was Northern Europe's most important Christian pilgrimage site during the Middle Ages , with pilgrimage routes from Oslo in southern Norway and from the Jämtland and Värmland regions of neighbouring Sweden
Edited sentence: The large cathedral, built from 1070 on, is the most important Gothic monument in Norway and was Northern Europe's most important Christian pilgrimage site during the Middle Ages, with pilgrimage routes from Oslo in southern Norway and from the Jämtland and Värmland regions of neighbouring Sweden.They are located side by side, in the middle of historic Trondheim.Two of Norway's greatest tourist attractions are the Nidaros Cathedral and Archbishop's Palace