https://www.coinweek.com/news/auctions-and-shows/the-most-expensive-roman-gold-coin-ever-sold-at-a-public-auction/
According to the auction firm Numismatica Ars Classica and as reported by CoinWorld Jeff Starck, A rare gold aurei medallion of ancient Rome established what auction officials claim is a new world record price in an April 5 auction.
The Gold Medalion which depicts Roman emperor Maxentius sold for $1,407,550 U.S. (1.3 million Swiss francs).
Of the highest rarity, by far the finest of only two specimens known. One of the largest gold medallions to have survived, bearing a magnificent portrait and a finely detailed reverse composition. Good extremely fine
[More at the site]