 The first bridge over the River Clyde at Glasgow was recorded from around 1285, giving its name to the Briggait area of the city, forming the main North-South route over the river via Glasgow Cross.The founding of the University of Glasgow in 1451 and elevation of the bishopric to become the Archdiocese of Glasgow in 1492 increased the town's religious and educational status and landed wealth.Its early trade was in agriculture, brewing and fishing, with cured salmon and herring being exported to Europe and the Mediterranean.