Fresco, from the Italian word for 'fresh', is a mural painting technique in which water-based pigments are applied onto freshly laid, wet plaster (often called buon secco), most usually on wall surfaces. Fresco secco refers to the application of paint onto dry plaster which then requires pigments to be mixed with a wet binding agent such as egg – a method known as tempera. Few frescoes painted in ancient Greece survive, although remarkably preserved Roman wall murals can be found at Pompeii.
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While Frescoes developed in Italy from around the thirteenth century, they came to prominence during the Renaissance.