The streets of Deruta are lined with ancient kilns where ceramics were once baked. In the Renaissance period there were 52 kilns located in the ancient village, and the ceramics found in ancient structures indicate that the Deruta production of this period was very varied in quality and techniques.

Right next to the San Michele Arcangelo gate, in Biordo Michelotti street, there is the Ex Fornace Grazia, a completely renovated building now used as a museum and exhibition center, where the Tourist Information Office is located. The name of this ancient kiln comes from its first owners, the Grazia family, who began producing ceramics here in the early 1500s. During the early 1900s, the family moved the production to a new factory outside the town walls where the entire ceramic production cycle is still carried out to this day, from clay processing to firing. The "Ubaldo Grazia Maioliche" Museum is housed at the factory, making it a rare case of a factory-museum.