Math professor Dr. James Stewart, who is also a former violinist with the Hamilton Symphony Orchestra near Toronto, Ontario, has made millions writing calculus textbooks. When he decided to spend most of his fortune on a residence, he could have used any architect anywhere in the world. Instead of an international star, he selected the then-relatively unknown pair, Brigitte Shim and Howard Sutcliffe of Shim Sutcliffe to create his residence in a ravine in the posh Toronto neighborhood of Rosedale. Stewart was not looking to build just a residence, though. He also wanted a private concert hall and lots of curves. Other than that, he gave the architects unprecedented and probably never-to-be-repeated freedom. No schedule, and no design restrictions. A decade after the initial discussions with Shim and Sutcliffe, the $24 million US, 18,000-square-foot Integral House was completed. It does, indeed, have a multitude of seductive curves, massive amounts of floor to ceiling glass and a spectacular staircase. And, Dr. Stewart now gives concerts and throws parties and costume balls in his 150-seat concert hall.