Another part of the old city of Frankfurt is the Eschenheimer Turm (tower). The rectangular base was completed in 1400; the circular tower in 1428. It used to be one of the gates to get into the city. Today the fast paced city traffic zips around and past it.
This tower was once one of 60 towers, all part of the city wall which encircled the town. It was the only one saved when the city wall was torn down back in 1812. Now it is a city landmark.
There is a cafe somewhere upstairs in the tower. I would have liked to have visited this cafe; unfortunately it was closed the only time I managed to be in this area of the city.