Cancer, the Crab, being the fourth of the twelve constellations assigned an astrological sign of the Zodiac (22 June to 22 July). One of twelve inlaid marble panels decorating Bianchini's Meridian Line in the Basilica of Santa Maria degli Angeli, Rome (1702). They are positioned either side of the line at intervals of 30 degrees longitude and are the work of Francesco Tedeschi, who based them on the drawings of Jacobo de Gehn which were published in Bayer's Uranometria (1603), the celestial atlas which introduced the modern method of naming stars.