Fr Klaus Mertes is a German Jesuit, high school teacher, author and editor. He came to prominence as the whistle-blower who, as headmaster of the Jesuit school, Canisius-Kolleg, Berlin, first unveiled and addressed the historic sexual and physical abuse in the School. Through his actions, other victims from schools across Germany came forward.

Since 2011 he has been Headmaster of the Jesuit school, Kolleg St Blasien, and continues to be outspoken on the wider Church’s glacial response to the problem.