Jon Allen – Jon is a practising Architect (qualified 1982), and an accredited Conservation Architect.He was a tutor on the Prince of Wales’s first Summer School at Magdalen College, Oxford in 1990; and since then has tutored on The Prince of Wales’s Institute of Architecture Foundation & Graduate courses, The Prince’s School of Traditional Arts, and the Prince’s Foundation Summer Schools in London and New Orleans.For many years he was on the Design Review Panel of the Department of Health, latterly as a chair; and a judge on the Chilterns AONB Design Awards.His special interest and the focus of his architectural practice has been Geometry, since he started working with Professor Keith Critchlow, world-renowned Geometer, in 1985. He has published two books on the subject, Drawing Geometry and Making Geometry, both published by Floris Books, Edinburgh.