A fresco (pl. frescoes) is a form of painting, made on plaster on walls and ceilings.

Strictly speaking, a fresco should be painted on wet plaster. This was called buon fresco ("really fresh") in Italian, as opposed to secco ("dry"), which were paitings made on dried plaster. In reality, the term fresco is commonly used about both buon fresco and secco paintings.

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