This November, Sotheby’s will present three remarkable works at auction from the esteemed collection of Harry Frank Guggenheim, the distinguished American businessman, philanthropist, and diplomat instrumental in founding the Solomon R. Guggenheim Museum in New York. Offered during Sotheby’s Modern Evening Auction in New York will be Franz Marc’s Das Lange Gelbe Pferd (Est. $8–12 million), a striking example of Marc’s most iconic subject, completed on the eve of World War I; Alberto Giacometti’s Buste (Tête tranchante) (Diego), (Est. $10–15 million), a bust of Diego Giacometti acquired by Guggenheim soon after it was cast and lent to the artist’s first-ever museum exhibition at the Guggenheim Museum in 1955; and Paul Gauguin’s La Femme noire (Est. $700,000–$1 million), a key ceramic work showcasing the artist’s signature blend of earthy materials and bold, primal forms. It is one of the most important ceramics by the artist to ever appear at auction.