The ivy-leaf pattern is derived from Valencian lusterware, which was imported into Tuscany in large quantities during the 1400s. Italian potters, who at the time had not yet learned how to produce the sheen of lusterware, simulated the effect with paint.
Elia Volpi, Davanzati Palace, Florence (sold 1916); [his sale, American Art Association(November 21-28, 1916, lot 635)]
Art treasures and antiquities formerly contained in the famous Davanzati Palace, Florence, Italy, which together with the contents of his Villa Pía were brought to America by their owner Professor Commendatore Elia Volpi. New York: American Art Association, November 21–28, 1916. no. 635.