are represented by the first ten letters of the
Hebrew alphabet, which in Hebrew usage may be used
interchangeably with the numbers 1–10. In recent centuries, the tablets have been popularly described and depicted as round-topped rectangles, but this has little basis in religious tradition. According to rabbinic tradition, they were rectangles, with sharp corners, and indeed they are so depicted in the 3rd-century paintings at the
Dura-Europos Synagogue and in Christian art throughout the 1st millennium CE, drawing on Jewish traditions of
iconography. in the 10th century
Byzantine Leo Bible. Depictions of round-topped tablets appear in the Middle Ages, following in size and shape contemporary hinged
writing-tablets for taking notes (with a stylus pressing on a layer of wax on the insides). For
Michelangelo (1475–1564) and
Andrea Mantegna (1431–1506) they still have sharp corners (see
gallery), and are about the size found in rabbinic tradition. Later artists, such as
Rembrandt (1606–1669), tended to combine the rounded shape with a larger size. While, as mentioned above, rabbinic tradition teaches that the tablets were squared, according to some authorities, the Rabbis themselves approved of rounded depictions of the tablets in replicas – so that the replicas would not exactly match the historical tablets. According to the Talmud, each tablet was square, six
tefachim (approximately 50 centimeters, or 20 inches) wide and high, and more a thicker block than a tablet, at three tefachim (25 centimeters, 10 inches) thick, though they tend to be shown larger in art. (Other Rabbinic sources say they were rectangular rather than square, six tefachim high and three wide and deep.) Also according to tradition, the words were not engraved on the surface, but rather were bored fully through the stone. ==Christian replicas==