As Belgium is a catholic country "All Saints Day" (November 1st) is an official holiday and everything is closed. The use is that on this day, Belgians bring flowers and wreaths to their deceased relatives and friends. A few years ago I visited the Laeken cemetery. At that time it was not so well known, but now the beautiful statues on the graves have been discovered and this cemetary has become a tourist attraction.
You can read more about the Laeken cemetary on my Travel blog here
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