What is currently known about astrological notation is quite sparse. No in depth study has been made on the history of Classical and Medieval notation. The glyphs seem to have been in place since the late antiquity with some variations, but they are not commonly used in both Latin and Arabic charts....

For one thing, it claims that, until the end of the 17th century, astrologers were not permitted to draw the charts of living people in any other than the old "Pythagorean square" style, in keeping with a Catholic mandate. Whereas for non-Catholics (astrologers? Nativities?), it was alrig...