The abbey was originally built to the south of the city walls around the year 1070, but this soon proved to be too small to accommodate the influx of Irish monks. A new site outside of the western city gate was purchased, and construction of a new abbey began around 1100. Around 1300 the city walls were extended and St. James became a part of the fortified city. The new western gate, directly adjacent to the church, became known as the "Jakobstor".