How a painting was made, why a building stands, what a style was reacting against. Each entry answers one question about a work, a maker or a technique, from what conservators, historians and the makers themselves have left on the record.
Paintings and sculpture · buildings and cities · techniques and materials · movements and their quarrels
Medieval glaziers melted sand with wood-ash potash to make coloured glass, blew it into sheets, cut the pieces against a full-size drawing on a whitewashed table, painted detail onto the surface with an iron-oxide paint…
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