Enfilade in architecture means the flowing arrangement of rooms in a straight line so that if you stood at one end of the line, you could see all the way through to the other end without any obstructions like doors or walls in between. This was often done in fancy palaces and grand homes because it gave a feeling of spaciousness and elegance. It's like standing in a long hallway with many doors on either side that are all open, so you can see all the way to the end. In fact, enfilade is a French word that means "to thread" or "to run through," which perfectly describes this type of room arrangement. So, next time you visit a grand palace or mansion, see if you notice any enfilades!