Ritterbach publishing house
The Ritterbach publishing house , based in Erftstadt , publishes the publications of the Ministry for Schools and Further Education in North Rhine-Westphalia, the pastoral paper for the dioceses of Aachen, Berlin, Essen, Hildesheim, Cologne and Osnabrück . Ritterbach Verlag GmbH is part of the Ritterbach Group . The managing director is the Cologne entrepreneur, carnival and football functionary Markus Ritterbach .