The other day I walked through Leiden, the town I live in, and tried to look at my surroundings from a different perspective. I noticed the many plaques that adorn all sorts of old buildings and tell its history. Here are some of the things I saw:
As you can see, the two red keys are a recurring theme. This is because the coat of arms of Leiden depicts two red keys, crossed in an X-shape on a white background. These keys are a reference to St.Peter, who guards the entry way to heaven and after whom a large church in the city center is named. Because of this coat of arms, Leiden is referred to as the “Sleutelstad” (“the key city”).
Epi's Travel Central 