Andy Warhol and Edie Sedgwick at Warhol's New York studio, the Factory, in 1966. Credit: Herve GLOAGUEN / Rapho / Getty Images

21 Days of Andy Warhol is Sotheby’s three-week celebration of the essential 20th century artist with one-a-day stories and videos about Warhol’s origins, influences, inspirations, all leading up to the sale of important Warhol pieces in our Contemporary Art Evening auction 13 November.

NEW YORK - Andy Warhol's New York studio, the Factory, had three locations from the 1960s to the 1980s. These studios were working spaces, where Warhol enlisted the help of art-world figures and performers, dubbed "superstars", to help him create silkscreens for his paintings and to act in film shoots.

The original location on East 47th Street, shown above with Warhol and Edie Sedgwick in reflection, was known as the Silver Factory, thanks to its walls covered in foil and silver paint. Featured in several of Warhol's films, Sedgwick was the first Factory superstar and the artist's original muse. Andy met Edie in early 1965, and was immediately taken by her beauty and social pedigree (the Sedgwicks were one of New England families). With her striking looks and silver hair (to match Andy's) Edie was the ultimate girl about town, but deeply unhappy. Like many in the Factory orbit, she was plagued by drug addiction and died young, at age 28.

Tomorrow: Andy and Death.