Complot typographique // Stonemasons marks and Adrian Frutiger « ALL ABOUT LETTERING
►http://stoneletters.wordpress.com/2011/10/25/stonemasons-marks-and-adrian-frutiger
These marks are from Strasbourg Cathedral and date from a period between 1200 and 1700, with the top row being the earliest. Frutiger (who designed Univers) observes ‘the origin and development of stonemasons’ signs are closely associated with the social circumstances of the Middle Ages’.