Complex sentence: From the Middle Ages onwards, it often served as a place to stage important political and cultural events for a larger audience, for instance, where the German king and his retenue was formally welcomed by the abbess of the Fraumünster abbey.
Split into simpler sentences: From the Middle Ages onwards, it often served as a place to stage important political and cultural events for a larger audience. It is where the German king and his retenue was formally welcomed by the abbess of the Fraumünster abbey.