It is not a dargah or a shrine, it is actually a "sufi
temple" (as they call it themselves) of a I think a dutch
sect that is inspired by Hazrat Inayat Khan RA. I think you
are aware of this movement that have created some kind of universal
religion. They call themselves Sufi movement Netherlands.
http://www.soefi.nl/2activit/eredienst.htm
on this site there is information in dutch about that movement,
and somehwere in the middle of the page you can see another
photo of what is actually inside of the building in Katwijk,
the Netherlands. So I think it is more a building in which they
meditate and have gatherings.
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