The house has more than 70 rooms, all arranged around a central courtyard, "the confines circumscribed by the moat." The house is surrounded on all sides by a square moat, crossed by three bridges. The earliest surviving evidence is for a house of the early 14th century, with the great hall, to which were attached, at the high, or dais end, the chapel, crypt and two solars. The courtyard was completely enclosed by increments on its restricted moated site, and the battlemented tower was constructed in the 15th century. Very little of the 14th century survives on the exterior behind rebuilding and refacing of the 15th and 16th centuries.