You know what's crazy too is that in colonial America all the brick buildings you see in Boston, etc were also all painted? Well, limewashed technically. You never would have left a bare brick facade. You would put 10-20 coats of thin whitewash on it, or if you wanted it to look like raw brick you would tint the limewash red, and then go in and touch up the mortar lines trompe l'oeil style with white.

Bare brick as an aesthetic choice did not emerge until the late 19th century.