Johannes Wilde

Johannes Wilde CBE (2 July 1891 – 13 September 1970) was a Hungarian art historian and teacher of art history. He later became an Austrian, and then a British, citizen. He was a noted expert on the drawings of Michelangelo. Wilde was a pioneer of the use of X-rays as a tool for the study of both the creation and the state of conservation of paintings. From 1948 to 1958 he was deputy director of the Courtauld Institute of Art in London. Provided by Wikipedia