File:Mosaic depicting a sitting dog, Ptolemaic Period, 2nd century BC, Bibliotheca Alexandrina Antiquities Museum - Flickr - Following Hadrian.jpg

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Description A floor mosaic using tesserae made of minute stone cubes, ranging from one to four millimetres in the opus vermiculatum technique.

The central medallion or emblem carries the picture of a dog, the first time ever such a motif is found on a floor mosaic in Alexandria. The dog is resting on his hind legs close to an upturned Greek vessel. The naturalistic image expresses strength and vitality, which points to the fine ability of the artist in using this medium to achieve clarity of design and definition. The fell of the dog, its spots and red collar are executed very precisely. The main colours in this medallion include black, white and yellow, yet the artist was able to convey light and shade in a brilliant manner. The angle of the dog's portrait is at three quarters, and the front part reflects light, while the rest of the body is in the shade. The gradation of shading on the upturned bronze pot shows light reflected on the central part, while the sides are gradually darker. The artist has indeed been able to express great depth in a 'hard' medium and this mosaic is a testament to the sophistication of mosaic workshops and artistry in ancient Alexandria.

Perhaps the theme on this floor is a scene of a theatrical story or from a literary work of art of Alexandria during the first three centuries B.C. However, the mosaic does not provide us with a clear idea as to the place where it was housed, but we can deduct that its shape was circular and about three metres in diameter, with this medallion as its centrepiece.

Mosaic The Greeks used mosaics to decorate their floors in public places and private dwellings by using tesserae in many ways. Tesserae are the small pieces of stone, limestone, marble, glass or clay, which are cut in a small cubic form, hence their name. The Greek floor coverings became a complete tableau depicting plants, animals, geometrical designs and Greek/ Hellenistic motifs.

The Romans adopted also this art to cover their floors in homes and temples, as well as in their tombs. The Romans applied the same techniques of the Greeks. They also introduced new innovations in the manufacturing process.