Christie's is an art business and a fine arts auction house, and currently the world's second largest, after Sotheby's, with sales in 2011 some $5.7 billion.

The official company literature states that founder James Christie conducted the first sale in London, England, on 5 December 1766, and the earliest auction catalogue the company retains is from December 1766. However, other sources note that James Christie rented auction rooms from 1762, and newspaper advertisements of Christie's sales dating from 1759 have also been traced.

Christie's soon established a reputation as a leading auction house, and took advantage of London's new found status as the major centre of the international art trade after the French Revolution.

Christie's was a public company, listed on the London Stock Exchange from 1973 to 1999, after which it was taken into private ownership by Frenchman François Pinault.

On 28 December 2008, The Sunday Times reported that Pinault's debts left him "considering" the sale of Christie's and that a number of "private equity groups" were thought to be interested in its acquisition. In January 2009, Christie's was reported to employ 2,100 people worldwide, though an unspecified number of staff and consultants were soon to be cut due to a worldwide downturn in the art market; later news reports said that 300 jobs would be cut. With sales for premier Impressionist, Modern, and contemporary artworks tallying only $US248.8 million in comparison to $US739 million just a year before, a second round of job cuts began after May 2009 when the auction house was still reported to employ 1,900 people worldwide. One of the auction house's "rainmakers" in the sale of Impressionist and Modern art, Guy Bennett, resigned from the auction house just prior to the beginning of the summer 2009 sales season. Although the economic downturn has encouraged some collectors to sell art, others are unwilling to sell in a market which may yield only bargain prices.

Christie can refer to:

Dame Agatha Mary Clarissa Christie DBE (née Miller; 15 September 1890 – 12 January 1976) was a British crime writer of novels, short stories, and plays. She also wrote romances under the name Mary Westmacott, but she is best remembered for her 66 detective novels and more than 15 short story collections (especially those featuring Hercule Poirot or Miss Jane Marple), and her successful West End plays.

According to the Guinness Book of World Records, Christie is the best-selling novelist of all time. Her novels have sold roughly four billion copies, and her estate claims that her works rank third, after those of William Shakespeare and the Bible, as the most widely published books. According to Index Translationum, Christie is the most translated individual author, with only the collective corporate works of Walt Disney Productions surpassing her. Her books have been translated into at least 103 languages.

Agatha Christie published two autobiographies: a posthumous one covering childhood to old age; and another chronicling several seasons of archaeological excavation in Syria and Iraq with her second husband, archaeologist Max Mallowan. The latter was published in 1946 with the title, Come, Tell Me How You Live.