Gateway and entrance to Frans Hals museum.
This rather ominous looking gate is actually the entrance to a jolly nice and inviting museum at daytime: the Frans Hals museum, featuring a nice collection of 17th century paintings by Dutch master painters like Frans Hals and Goltzius.
Don't ask me how that ominous mushroom cloud shadow came into being... I guess the ghosts of it's four century history rattle their chains at nighttime...
For the less poetically minded: something to do with the symmetrical position of the lights, the arch and the doors rims...
But I am quite thrilled to have been able to capture this unexpected nighttime "transformation"...