Some of the large houses contained a picture gallery, known as the Pinacoteca, for the display of easel pictures. These have now virtually disappeared, but mural paintings are fairly common. Pictorial decoration for floors and walls was supplied by mosaics, the picture built up of small fragments (tesserae) of colored stones, mostly marble, or of small pieces of colored glass backed by gold foil to increase its reflective power. The subjects are very diverse. Floor mosaics in dining rooms were sometimes decorated with simulated fragments of food, as though they had dropped from the table. Many people want to know about Architect In Chandkheda. Roman furniture was made of stone, wood, or bronze. Villas were largely open to the air, and stone benches and tables were common. Wooden furniture has not survived, but bronze hardware for such furniture is well-known. Buffets with tiers of shelves were used to display silver. Tables were often made of exotic woods and veneers, with ivory, bronze, or silver trim. Tortoiseshell veneers were popular. The dining couches, which replaced chairs, were richly decorated, often with gilded silver or bronze. Chairs followed earlier Greek forms, and while no fixed upholstery was provided, cushions were plentiful.