A few Pompeian houses, like those of the olden time, are without a peristyle, having a garden at the rear. In such cases there is a colonnade at the back of the house, facing the garden; this is the arrangement in the houses of the Surgeon, of Sallust, and of Epidius Rufus. In the large house of Pansa (Fig. 179), we find both a peristyle and a garden, the latter being at the rear of the peristyle; and in many houses a small garden was placed wherever available space could be found. The peristyle is a garden enclosed by a colonnade, or having a colonnade on two or three sides. When this was higher on the north side than on the other three, as in the house of the Silver Wedding, the peristyle was called Rhodian. In the Tufa Period the colonnade was frequently in two stories, on all four sides or on the front alone. Fragments of columns belonging to the second story have been found in many houses, but in only one instance, that of the house of the Centenary, are they of such a character as to enable us to make an accurate restoration; here the double series of columns extended only across the front. [Illustration: PLATE VII.--INTERIOR OF A HOUSE, LOOKING FROM THE MIDDLE OF THE ATRIUM TOWARD THE REAR] A separate entrance, _posticum_ (Fig. 115), usually connected the peristyle with a side street. At the rear there was often a broad, deep recess, _exedra_, corresponding with the tablinum. The location of the other rooms in this part of the house is determined by so many conditions, and manifests so great a diversity that it may be spoken of more conveniently in connection with their use. VII. SLEEPING ROOMS The small, high rooms about the atrium were in the earlier times used as bedrooms; and such they remained in some houses, as that of the Faun, down to the destruction of the city. The sleeping rooms about the peristyle were much lower, and the front opened by means of a broad door in its whole, or almost its whole, width upon the colonnade. These rooms could frequently be entered also through a small side door from a dining room, or a narrow recess opening on the peristyle (Fig. 146, _x_). The design of the arrangement is obvious. In summer the inconvenient large door could be left open day and night, a curtain being stretched across the space; in winter it would be opened only for airing and cleaning, the small door being used at other times. The place for the bed was sometimes indicated in the plan of the room. In a bedroom of the house of the Centaur, of which an end view is given in Fig. 122, a narrow alcove was made for the bed at the left side; the floor of the alcove is slightly raised, and the ceiling, as often, is in the form of a vault, while the ceiling of the room is higher and only slightly arched. A similar arrangement is found in several other rooms decorated in the first style. In several houses, as in the house of Apollo, there is a sleeping room with alcoves for two beds.