San Crisogono
In March 1885, the Vatican and the Prussian State agreed on the replacement of the vacant chair of the Archbishop of Cologne. Pope Leo XIII appointed Krementz as the new Archbishop of Cologne on 30 July 1885. He was installed on December 15. In 1886, he became chairman of the German Bishops' Conference in Fulda. On 16 January 1893, he was elevated to cardinal. He was assigned the titular church of San Crisogono.