HRH Charles, The Prince of Wales, is heir to the British throne. The founder of The Prince Trust and 17 other Prince's Charities, and a patron of over 450 charitable organizations worldwide, his interests encompass a range of humanitarian and social issues. These include the conservation of historic buildings—a subject on which he produced the book A Vision of Britain: A Personal View of Architecture in 1989—organic farming, climate change, and environmental conservation.