A true rarity is the 1685 harpsichord by Mattia De Gand, a builder of Flemish origin who worked in Rome in the late 1600s and early 1700s. The painstaking restoration and in-depth study guided by Maestro Tagliavini revealed that the instrument was originally a one-tone transposing instrument, a true exception in the panorama of Italian harpsichord art of that time.