The late Gothic tower used to be a defence building and also a prison. Nowadays it houses a museum where you can see a historic clock. It is part of the Saalhof complex which is one of the oldest buildings in Frankfurt. As many other buildings in the city, it was damaged during WWII and then restored.
Mon: closed
Tue - Fri: 10 a.m. - 6 p.m.
Wed: 10 a.m. - 9 p.m.
Sat-Sun: 11 a.m. - 7 p.m.
General admission: €8
Student, Disabled: €4
Child (0-6): free
Wikipedia https://de.wikipedia.org/wiki/Rententurm
Official website http://www.historisches-museum.frankfurt.de/index.php?article_id=160&clang=1
Twitter https://twitter.com/histmus
Facebook https://www.facebook.com/historisches.museum.frankfurt?ref=searc
Email info.historisches-museum@stadt-frankfurt.de
Phone +49 69 21 23 51 54
Address Fahrtor 2, 60311 Frankfurt am Main, Germany
Coordinates 50°6'33.191" N 8°40'56.244" E