Andy Warhol photographed at The Factory, the artist's New York City studio, in in 1965 by Nat Finkelstein. Finkelstein was The Factory's house photographer in the mid- to late 1960s, during which time he captured some of the most famous images of Warhol and his crowd of artists and celebrities. Credit: Nat Finkelstein / Retna.

- This is 21 Days of Andy Warhol, Sotheby’s three-week celebration of the essential 20th century artist who continues to fascinate collectors, and who remains a singular force in the art market more than a quarter century after his death.

Over the next three weeks, look for one-a-day stories and videos about Warhol’s origins, influences, inspirations, all leading up to the sale of important pieces in our Contemporary Art Evening auction 13 November.

Read below for key information on the seminal works on offer:

Andy Warhol's Silver Car Crash (Double Disaster), 1963. Estimate upon request.

One of four car crash paintings on a monumental scale, Warhol's 1963 Silver Car Crash (Double Disaster) – the canvas on the left a grid of black, silk-screened images of a mangled car, the canvas on the right a shimmering field of silver – is the only of these works not currently in a museum collection. In a private collection since 1989, this masterpiece of his important Death and Disasters series has been shown publicly only once in the past 26 years.

Andy Warhol’s Liz #1 (Early Colored Liz), 1963. Estimate $20-30 million.

Executed in the same year as Silver Car Crash, Liz #1 (Early Colored Liz), is one of Warhol's famed portraits of celebrities – Elizabeth Taylor, Marilyn Monroe, Jacqueline Kennedy  – whose personal tragedies took place in the media's glare.

Andy Warhol's Flowers (Five Foot Flowers), 1964. Estimate $10-$15 million.

Andy Warhol’s Flowers (Five Foot Flowers) is one of the iconic images of Pop art. Four pristine white-petal flowers on a five-foot-square canvas of green and black, the work was created in 1964 for a famed show at dealer Leo Castelli's gallery and purchased by John and Kimiko Powers, renowned collectors who were among Warhol’s earliest patrons.

Andy Warhol’s 5 Deaths on Turquoise, 1963. Estimate $7-10 million.

Squarely in the middle of his Death and Disaster series, Warhol's 5 Deaths on Turquoise was painted between August and September 1963 using silkscreen ink over green acrylic. The visual impact of the color and expert execution combine with the horror of the subject matter to evoke a visceral reaction in the viewer.

Andy Warhol's Camouflage, 1986. Estimate $2.5-3.5 million.

Part of one of Warhol's last great series before his 1987 death, Camouflage has a monumental scale - 33 feet wide and more than 6 feet high - in addition to a hypnotic repetition. The namesake camouflage design is at once abstract yet recognizable, and comes freighted with social, cultural and political meaning.

Andy Warhol's The Statue of Liberty, 1986. Estimate $2-3 million.

Created a year before Warhol's death, and on the centennial of the New York Harbor landmark, The Statue of Liberty uses the camouflage pattern of the artist's late period while referencing the iconography of his earlier work.

Andy Warhol's Round Jackie, 1964. Estimate $1-1.5 million.

Dating to 1964, the year after President Kennedy's death, Round Jackie is one of only eight Jackie canvasses Warhol executed in the round gold format. This is an important piece of Pop Art from executed during the artist's most celebrated period.

Over the next 20 days, we will look at what made Andy Warhol one of the most important artists of his generation.

Tomorrow: Andy and His Famil