In brief:
On this page I try to make an overview of Foucault pendulums in the Netherlands.
If you know one which is not listed here, please send me a mail.
I also try to list other Amateur Pendulum Builders I know of.
For a world wide overview see https://en.wikipedia.org/wiki/List_of_Foucault_pendulums
Other Amateur Pendulum Builders:
Marcel Brétisey in Switzerland has built many pendulums. His website also shows a lot of other fun projects and his excellent skills.
Permanent Pendulums in the Netherlands:
Axel, Watertoren (Water Tower)
Brouwershaven, Grote of st. Nicolaaskerk (Church)
Lattrop, Cosmos observatory. This pendulum was made by Piet van der Hoeven. He also made the pendulum in Oldenzaal.
Fig. 1 and 2, Pendulum at Lattrop observatory
Nijmegen, Radboud University, Huygens building.
https://www.youtube.com/watch?v=oFv0IPktHJ8
https://www.youtube.com/watch?v=WDXno1vN_XQ
Oldenzaal, Thij College.
This Piet van der Hoeven also built a pendulum in the Thij-college in Oldenzaal. Video
The Technica Assistant in that school gave me a drawing by Piet which shows some constructional details of the suspension.
The pendulum uses a Charron ring, but above it sits a tube drilled with several diameters to let the wire "gently bend".
I made a partial translation of the description of the Thij pendulum. Some interresting details can be seen, incl. a construction drawing of the top mount
Veere, Grote Kerk.
https://grotekerkveere.nl/bezoek-de-experience/
Zwolle, Deltion Sprint Lyceum.
A newspaper reported in 2017 that the makers had serious problems before it worked well.
see: https://content.presspage.com/uploads/1375/stentor-3.pdf?10000
Temporary Projects / Demos:
Haarlem, St. Bavo church. By times they do a single demonstration.
https://www.youtube.com/watch?v=2Mfpfp1bNPM
Naarden, Grote Kerk.
The website does not mention the pendulum, but there seem to be demos by times https://verenigingvestingstad.nl/toren-beklimmen/