For some time I have been considering putting in a building with the most haunting foundation imaginable. What if this building (a castle, church, or some other structure) had the remains of several hundred thousand people under it? For my fantasy book, I was thinking of having this building created in the aftermath of a major battle in which the remains of the fallen are buried in a mass grave before having the structure built right on top of them to immortalize the battle. This would be a way for the victor to further take advantage of his crushing victory over his hated enemies. For this idea, I will be drawing inspiration from the catacombs under Paris, which has the remains of over six million people.