James Stewart was an unlikely literary sensation.
The Canadian mathematician made a multimillion-dollar fortune by writing calculus textbooks for universities and high schools. Last year alone he sold 500,000 books, accounting for about $26.6m (£17.5m) in sales, according to his estate.
Stewart was also an unlikely architectural trailblazer. He devoted many years of his life, and much of his income, to building his dream home in an upmarket Toronto neighbourhood. Integral House — named after the
integral, a concept in calculus — is a shrine to calculus, the mathematics of flowing change.
Stewart died last December, aged 73, and Integral House is now for sale at £11.4m.
Stewart, whose other passion apart from maths was music, had two requirements he wanted the architects to meet: he wanted a house that was based on curves — which would require calculus in the design — and he wanted it to include a concert space.
After meeting with many top architects, he commissioned the Canadians Brigitte Shim and Howard Sutcliffe to come up with a design. Building work began in 2003 and finished in 2009. The house, at 194 Roxborough Drive, Rosedale, Toronto, cost more than £15m — via The Guardian