PEN Canada is one of the 144 centres of International PEN. Founded in 1926, it has a membership of over 1,000 writers and supporters who campaign on behalf of writers around the world who are persecuted, imprisoned and exiled for exercising their right to freedom of expression. Over the years, PEN Canada membership has included many of the leading figures in the Canadian literary and cultural establishment, including Margaret Atwood, Adrienne Clarkson, John Ralston Saul, David Cronenberg and Yann Martel.