Meister or Master Gerhard (* c 1210/1215 allegedly in Reil – 24 or 25 April 1271 in Cologne) was the first master mason of Cologne Cathedral. He was also known as Gerhard von Rile or by the Latin version of his name, Meister Gerardus.
Cologne Cathedral (German: Kölner Dom) (Latin: Ecclesia Cathedralis Sanctorum Petri et Mariae, officially Hohe Domkirche St. Petrus, English: High Cathedral of Saints Peter and Mary) is a Roman Catholic cathedral in Cologne, Germany. It is the seat of the Archbishop of Cologne and the administration of the Archdiocese of Cologne. It is a renowned monument of German Catholicism and Gothic architecture and is a World Heritage Site. It is Germany's most visited landmark, attracting an average of 20,000 people a day.