The Making of Middle Earth, about the sources Tolkien used to create The Hobbit and The Lord of the Rings.
This is a cutaway section of a meadhall, where feasting and drinking would take place, all with a big fire pit raging in the center of the floor. With wooden walls. And a thatched roof. You know, when I put it that way, that may be the reason why people need to draw what they used to look like, instead of taking a picture of any existing ones.