I was reading the Entreprise Architecture message board on Linked In when I bounced again on this definition of an Architect by Vitruvius:

"The ideal architect should be a person of letters, a mathematician, familiar with historical studies, a diligent student of philosophy, acquainted with music, not ignorant of medicine, learned in the responses of jurisconsults, familiar with astronomy and astronomical calculations."—Vitruvius, circa 25 BC

See the part on the education of the architect here:
http://www.lih.gre.ac.uk/histhe/vitruvius.htm