PHILADELPHIA — In three back-to-back sales, two held on May 11 and one on May 12, Freeman’s brought fresh-to-market modern and contemporary art and design works to auction, including single-owner collections. The trio of auctions was marked by competitive bidding between international buyers, resulting in sales of Henry Moore’s bronze Architectural Project for $428,400, Marc Chagall’s Devant la Fenetre a Sils for $453,600, and a Conoid bench by George Nakashima for $94,500.