Paintings that need to be added to the map:
https://www.wikiart.org/en/oskar-kokoschka/not_detected_235880
https://www.wikiart.org/en/cornelis-vreedenburgh/a-view-of-amsterdam-with-the-st-nicolaas-church
https://www.wikiart.org/en/cornelis-springer/the-jewish-quarter-in-amsterdam