Thomas Agnew & Sons was established in 1817 and shortly after became one of Mayfair’s leading dealerships. Since then Agnew’s has held a pre-eminent position in the world of Old Master and 19th century British painting. The gallery has handled works by, amongst others, Caravaggio, Van Dyck, El Greco, Frans Hals, Poussin, Rembrandt, Rubens, Vermeer, Titian, Turner and Velázquez, including the latter’s Rokeby Venus in the National Gallery, London.