Most of the large houses in the 1400s period were built on the capital H principle, the two uprights would have had a floor on the top. The cross piece would have been the main hall. , There were few chimneys prior to the 12th century, the fire in the larger houses being in the centre of the floor, the smoke escaping through doors and holes in the roof; hence "sluttish soote, a whole inch thick". The evolution of the manor house followed (13century onward). The most striking feature was the open-roofed hall. One notices the two wings each of two stories; solar near to the chapel or part of it; domestic offices, buttery, pantry, etc; hall with hearth in middle. Men servants, soldiers, slept on rushes in the hall. Other rooms gradually evolved leading from the hall and solar until the building became complex; it grew rather than designed. The hall was next devided, and became of less importance after the 11th century, except as a living room, until eventually the word hall was only used for the entrance lobby. The Solar became the drawing room.