Powell is the retired CEO of former Belgian beer giant Interbrew (today part of Anheuser-Busch InBev). His 47,0000 sq.ft. mansion is one of the largest in Canada.
Here are some pics though:
http://homesoftherichest.files.wordpress.com/2008/10/chelsterhall.jpg
http://www.torontolife.com/wp-content/uploads/2013/06/oakville-gold-coast-4.jpg
http://beta.images.theglobeandmail.com/685/life/home-and-garden/real-estate/article4391578.ece/ALTERNATES/w620/oakville-home0712re06.JPG