Kalkar (German: is a municipality in the district of Kleve, in North Rhine-Westphalia, Germany. It is located near the Rhine, approx. 10 km so…Kalkar (German: is a municipality in the district of Kleve, in North Rhine-Westphalia, Germany. It is located near the Rhine, approx. 10 km south-east of Cleves. The catholic church St. Nicolai has preserved one of the most significant sacral inventories from the late Middle Ages in Germany.