His book and BBC documentary "A Vision of Britain" (1987) was also critical of modern architecture, and he has continued to campaign for traditional urbanism, human scale, restoration of historic buildings, and sustainable design, despite criticism in the press. Two of his charities (The Prince's Regeneration Trust and The Prince's Foundation for Building Community) promote his views, and the village of Poundbury was built on land owned by the Duchy of Cornwall to a master plan by Léon Krier under the guidance of Prince Charles and in line with his philosophy.