From 1955 to 1974 Moore became a Trustee of the National Gallery, London. He took International Sculpture Prizes at the 24th Venice Biennale in 1948 and at the 2nd Sao Paulo Biennale in 1953. The award of Companion of Honour in 1955, the Order of Merit in 1963, and the Erasmus Prize in 1968 are just a few from a list of over seventy accolades he gained from over a dozen countries.
Moore received increasingly prestigious commissions abroad, including the monumental Roman travertine marble Reclining Figure 1957-58 (LH 416) for the UNESCO headquarters in Paris, and at home the abstract Knife Edge Two Piece 1962 (LH 516) in bronze which stands outside the Houses of Parliament. He became an icon for post-war Britain, something of a national institution with everyone wanting a work by Henry Moore. From the 1950s onwards, with a huge increase in commissions, Moore produced much larger sculptures, and employed assistants including Anthony Caro, Phillip King, John Farnham, Malcolm Woodward, and Michel Muller to help him. The scale and quantity of his work grew and grew; in total there are about 919 sculptures, 5500 drawings and 717 graphics.