Margareta-Erminia Cassani Michigan, United States   Zodiac Man, Homo Signorum, from Guild Book of the Barber Surgeons, c 1486, BL MS Egerton, 2572, f. 50v.  Luminarium:  Encyclopedia Project Imagine your doctor telling you that you need surgery. Then they follow that unsettling news with something, well, a little strange sounding. They tell you that the date…