Sarah Brown is Director of the York Glaziers Trust, a lecturer in History of Art at the University of York, a Fellow of the Society of Antiquaries and chairman of the British Corpus Vitrearum Medii Aevi (the international corpus of medieval window glass). She is currently overseeing the conservation of York Minster's Great East Window, part of York Minster Revealed, a conservation and interpretation project made possible by the generous funding of the Heritage Lottery Fund