Today I was sitting on the bridge in front of the Amsterdams Lyceum that was finished in 1920, seeing 15 arches.
Look at the 2 arches for the bike road under the Amsterdams Lyceum. Maybe my fantasy is overstimulated, but I consider both the side columns of the building, as the statues on the bridge as twin pillars.
Some have noted the similarity to the Rijksmuseum.
I also counted the windows on the 7 different sections that you can see from either the front or the back of the building (this is really the back of the building).
You can see the 3 middle sections with 12 windows and 2 times 12 in the photo. You can see part of the 2 outer sections with 2 times 12 windows. The most outside 2 sections (that are just outside the previous photo) have another 2 times 6 windows (for a surprise not 12)...
This make a grand total of 72 windows, or 4 times 18, with 18 the number of the Beast 666.
On the other side of the bridge is the Olympiaplein with in front of it the controversial Monument Indië-Nederland (to celebrate hundreds of years of plundering the Dutch West Indies).
It was originally made in 1935 for the Governor-General of Nederlands-Indië and war criminal Johannes Benedictus van Heutsz (1851-1924), who as commander of the KNIL army had mass murdered "savage" Indonesians in Atjeh.
At this time it was still plundered as a Dutch colony. If I understand correctly some countries are actually ashamed of their colonial past, but not over here!
This is how it looked a long time ago, before WW II probably. Picture taken from the roof of the Amsterdams Lyceum?
There is a statue of a woman flanked by 2 lions, with behind her the twin pillars, with the arched sun on top, with 13 rays.
Behind, below it are 6 arches on both sides of the twin pillars, making a total of 13 arches.
Some have noted that the woman has nothing to do with Van Heutsz, and is surely no Indonesian woman.
It looks more like an ancient Greek (or Roman) statue, with the woman holding a legal scroll as a symbol for the Dutch monarch (Queen Wilhelmina at the time) holding the Dutch West Indies.
In 2000, the monument was rearranged (until then it was still the Van Heutsz monument) on the proposal of Rob Aspeslagh of Clingendael (the Dutch RIIA/CFR).
They changed the arch on top, into a double, yellow, blue arch, with the sun again with 13 rays.
The other change, besides the double arch, are 3 twin pillars, with a fourth single pillar (that you can see on the front, left of the following photo), making a total of 7 (I don't know the relevance)...

(in Dutch)
https://marionalgra.wordpress.com/tag/sarong/
http://www.buitenbeeldinbeeld.nl/Amster ... Heutsz.htm