STC151334 Constellation of Ophiuchus Group, from \'Uranometria\' by Johann Bayer, engraved by Alexander Mair (1559-c.1616) 1603 (hand-coloured copper engraving) by Bayer, Johann (1572-1625) (after); Private Collection; (add.info.: science of measuring distances and magnitudes of the heavenly bodies; holding separated serpents known as Serpens Caput (serpent\'s head) and Serpens Cauda (serpent\'s tail); giant is identified with the healer Asclepius father of the medical profession; considered the thirteenth sign of the Zodiac;); The Stapleton Collection; German, out of copyright.