Thomas Agnew & Sons

Thomas Agnew & Sons, known simply as Agnew's, was one of London's leading fine art dealerships. Founded in Manchester in 1817 and established in London from 1860, the firm operated for most of its history from galleries at 43 Old Bond Street, supplying old master paintings to the great British and American collectors of the nineteenth and twentieth centuries.

Agnew's handled several Vermeers over the years, among them The Guitar Player, which it sold in 1889 to Edward Cecil Guinness, later Earl of Iveagh, and the firm's Bond Street galleries regularly staged loan exhibitions of old masters drawn from private collections.