Auction House

Diadema is an established auction house that connects buyers and sellers through live and online auctions. From Sp, the team provides appraisal services, consignor support, and clear, customer-friendly terms to help every sale run smoothly.

At Diadema located at Sp, collectors and bidders enjoy a modern, transparent experience with detailed cataloging, condition reports, and flexible bidding options for in-person or online auctions.