 Frank Lloyd Wright is an American icon - it s most famous modern architect, and probably it s most prolific - over 400 buildings in a 60-year career. But his most revealing constructions are his houses, revolutionary in their open plan design, and conceived as an expression of Wright s philosophy of a perfect harmony between man and nature:  organic architecture  as he called it. Wright s houses also embody an ideal for living based on calmness and order, but his own life was characterised by public scandal, financial chaos and personal tragedy.