 His years at Glasgow left a mark on history that can be compared favourably with any previous or future bishop. Jocelin commissioned his namesake Jocelin of Furness, the same man who had written the Life of St. Waltheof, to write a Life of St. Kentigern, a task all the more necessary because, after 1159, the Papacy claimed the right to canonise saints. Kentigern, or Mungo as he is popularly known, was the saint traditionally associated with the see of Glasgow, and his status therefore reflected on Glasgow as a church and cult-centre. There had already been a cathedral at Glasgow before Jocelin's episcopate. The idea that the ecclesiastical establishment before Jocelin was simply a small church with a larger Gaelic or British monastic establishment has been discredited by scholars. Jocelin did, though, expand the cathedral significantly. As the Chronicle of Melrose reports for 1181, Jocelin "gloriously enlarged the church of St Kentigern". However, more work was created for the builders when, sometime between the years 1189 and 1195, there was a fire at the cathedral. Jocelin thus had to commission another rebuilding effort. The new cathedral was dedicated, according to the Chronicle of Melrose, on 6 July 1197. It was built in the Romanesque manner, and although little survives of it today, it is thought to have been influenced by the cathedral of Lund, the archbishop of which had consecrated Jocelin as bishop.
