Walter Brandmüller

Walter Brandmüller PhD (born 5 January 1929) is a cardinal of the Catholic Church and president Emeritus of the Pontifical Committee for Historical Sciences. As required by canon law for cardinals, he was appointed a bishop.
On 22 July 1990, he received the Cross of the Order of Merit of the Federal Republic of Germany from president Richard von Weizsäcker. He served as President of the International Commission for Contemporary Church History from 1998 until 2006. He is a canon of the chapter of the Saint Peter's Basilica since 1997.
Brandmüller was born in Ansbach, Germany.
Brandmüller, along with three other cardinals, has issued a request to Pope Francis, entitled "Seeking Clarity: A Plea to Untie the Knots in "Amoris Laetitia"", seeking clarification on various points of doctrine in the Pope's apostolic exhortation, "Amoris laetitia". 
In June 2017 after seven months of not receiving a response from Pope Francis to their request that he clarify highly disputed parts in his apostolic exhortation Amoris Laetitia (The Joy of Love), four cardinals asked the Holy Father for an audience in April but the Pope has yet to respond, it has emerged. 
In an April 25 letter hand-delivered to the Holy Father on May 6, Cardinals Carlo Caffarra, Brandmüller, Raymond Burke and Joachim Meisner wrote to Francis asking for an audience, having received no response to the dubia they sent him on Sept 2016.