Our tour of Italian auction houses begins with San Luca Casa d’Aste, which on July 23 will present “DESIGN, MODERN AND CONTEMPORARY FURNITURE” at its headquarters in Solesino (Padua). Next up is the Florence-based MaisonBibelot, which is holding a timed auction of “Collectible Coins” through July 27—a selection reserved for numismatists and coin collectors.