
In palaces, in fortresses, it was a prison, sometimes a sepulchre also, sometimes both together. In cathedrals, it was, in some sort, another subterranean cathedral, low, dark, mysterious, blind, and mute, under the upper nave which was overflowing with light and reverberating with organs and bells day and night. Unless built upon piles, like Notre-Dame, a palace, a fortress, a church, had always a double bottom.

In the Middle Ages, when an edifice was complete, there was almost as much of it in the earth as above it. Lasciate Ogni Speranza-Leave All Hope Behind, Ye Who ENTER HERE.
