The Zimmer Tower is a tower in Lier, named after clockmaker Louis Zimmer, and is the result of the transformation of the medieval Tower Cornelius who was a part of the first wall around the city.
The build year of the original tower is not precisely known, but it must be before 1425. The tower was sold by the town council in 1812 but was then again bought after World War I because the city council wanted to demolish the tower. In 1928 Louis Zimmer donated a clockwork mechanism (the Jubilee Clock) to the city of Lier that indicates various times, cosmic, and other periodic phenomena. It was decided to build this clock in the dilapidated Cornelius Tower, with the purpose to rebuilt and restored the tower. Since then the Cornelius tower is called the Zimmer Tower. The inauguration of the Zimmer Tower took place on June 29, 1930. The entire renovation cost a total of 169,230.40 Belgian francs and was for the most part done by volunteers.