I am not sure but I think this is the church of St. Petri, according to this webpage, the only 5 naved hall church in Northern Germany. Lübeck is a city of many church spires, and this one as well as those of the other churches (such as the Marienkirche seen in these photos) appear on the city logo used on highway signs and elsewhere to indicate this town.

5 spires
5 spires