OECI, from the Greek οἶκος, were spacious halls or saloons borrowed from the Greeks, and were frequently used as triclinia. They were to have the same proportions as triclinia, but were to be more spacious on account of having columns, which triclinia had not.--4. EXEDRAE were rooms for conversation and the other purposes of society.--5. PINACOTHECA, a picture-gallery.--6, 7. BIBLIOTHECA and BALINEUM are treated of in separate articles.--8. CULINA, the kitchen. [Illustration: Kitchen of the House of Pansa at Pompeii.] The food was originally cooked in the atrium: but the progress of refinement afterwards led to the use of another part of the house for this purpose. In the kitchen of Pansa’s house at Pompeii, a stove for stews and similar preparations was found, very much like the charcoal stoves used in the present day. Before it lie a knife, a strainer, and a kind of frying-pan with four spherical cavities, as if it were meant to cook eggs.--9. COENACULA, properly signified rooms to dine in; but after it became the fashion to dine in the upper part of the house, the whole of the rooms above the ground-floor were called _coenacula_.--10. DIAETA, an apartment used for dining in, and for the other purposes of life. It appears to have been smaller than the triclinium. _Diaeta_ is also the name given by Pliny to rooms containing three or four bed-chambers (_cubicula_). Pleasure-houses or summer-houses are also called _diaetae_.--11. SOLARIA, properly places for basking in the sun, were terraces on the tops of houses. The preceding cut represents the atrium of a house at Pompeii. In the centre is the impluvium, and the passage at the further end is the ostium or entrance hall.--The preceding account of the different rooms, and especially of the arrangement of the atrium, tablinum, peristyle, &c., is best illustrated by the houses which have been disinterred at Pompeii. The ground-plan of one is accordingly subjoined. [Illustration: Ground-plan of a House at Pompeii.]