He created unique pieces that blur the distinction between design and sculpture. Castle’s organic and whimsical approach to sculpture incorporates his own invented technique of carving into stacked laminated wood known as lamination. His collectible designs for residential clients, public spaces, and a number of churches represent a unique exploration of the qualities and possibilities of wood and fibreglass.
His work can be found in the permanent collections of more than forty museums and cultural institutions, including the Victoria & Albert Museum in London, the Metropolitan Museum of Art in New York, the Museum of Modern Art in New York, and the White House in Washington, D.C.
Moreover, he has been the recipient of many honours and awards, including four National Endowment for the Arts grants and the Modernism Lifetime Achievement Award from the Brooklyn Museum in 2007.
