La tour d'Eben-Ezer

This tower stands just across the border from Maastricht, in Bassengen (Belgium). It stands on a hill and is a tower built from silex (I think in English it's called flint, some type of quarz stone). The tower was made by the esoteric philosopher Robert Garcet in the early 60s.
On top of the tower there are 4 large statues, which depict the 4 announcers of the Apocalypse, each looking into another direction.
A strange building. I had wanted to draw it a long time, but it was difficult to be reached.
I made 2 versions, but the other one was pretty grim.