The Zimmertoren is a tower in Lier, in the Belgian province of Antwerp. Named after watchmaker Louis Zimmer, the tower is the result of the rebuilding of the medieval Cornelius Tower, which was part of the first ramparts around the city.

The clock on the tower is called the Jubelclock. It is an ingenious clock with 13 time indications. Inside the tower you can behold the mechanism of this fascinating clock.