File photo dated April 04, 1976 of swiss theologian Hans Kung presented his latest book "Being Christian'' published by Londadori. In the past Prof. Kung Fu in controversy with Vatican authorities for his works. - The influential and controversial Swiss theologian Hans Küng died Tuesday at the age of 93. The German Catholic Church’s official website said that Küng died on the afternoon of April 6 at his home in Tübingen, southwest Germany. Photo by Catholic Press Photo/IPA/ABACAPRESS.COM