The choir screen wall of Nidaros Cathedral. An architectural staging of the cult of st. Olav?By Øystein Ekroll The site of the grave of St Olav (d.1030) was also the site of the high altar of Nidaros (Trondheim) Cathedral, and the shrine of the royal saint was placed above the grave and behind the high altar. The grave site became the fixed point in the cathedral’s history, and its architectural development was focused around this point. As the cathedral was gradually developed and extended, the line of the choir screen wall marking the boundary between the sacred area and the rest of the cathedral stayed immobile through the centuries. Three generations of the choir screen wall are known, ranging from the simple, wide opening of the late e...