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Fresco is any of several related mural painting types. We use the classical Buon fresco technique made on fresh (hence the name) lime mortar or plaster.

The word fresco comes from the Italian word affresco [af?fres?ko] which derives from the Latin word for "fresh". Frescoes were first developed in the ancient world and continued to be popular through the Renaissance. In painting buon fresco, a rough underlayer called the arriccio is added to the whole area to be painted, and allowed it to dry for some days. On the day of painting, a thinner, smooth layer of fine plaster, the intonaco, is added to the amount of wall that can be expected to be completed in a day, sometimes matching the contours of the figures or the landscape, but more often just starting from the top of the composition. This area is called the giornata ("day's work"), and different day stages can usually be seen in a large fresco.

 Buon frescoes are difficult to create because of the deadline associated with the drying plaster. Generally, a layer of plaster will require ten to twelve hours to dry; ideally, an artist would begin to paint after one hour and continue until two hours before the drying time—giving seven to nine hours working time.

Once a giornata is dried, no more buon fresco can be done, and the unpainted intonaco must be removed with a tool before starting again the next day. If mistakes have been made, it may also be necessary to remove the whole intonaco for that area—or to change them later a secco