* From 4 pm, no new visitors can enter.
Former building of TU Geodesy Department, built in 1892-1895. Designed by architect Jan van Lokhorst, in a mix of neo-Gothic and neo-Renaissance styles. Central tower with main entrance, stairwell, and observatory supported by four detached brick columns and built after Leiden example. Columns supporting observatory are vibration-free, i.e. separate from stairs so as not to interfere with observations. In the tower, several geodetic instruments are on display.
Left part of building was the professor’s house where Professor Willem Schermerhorn formed his first post-war cabinet in 1945. (not open in 2023)
For more information, have a look around in the digital magazine archive of the Stichting De Hollandse Cirkel and the Vereniging Geo Informatie Nederland.