How did 11th century Romanesque masons construct monumental groin vaults?

11th century Romanesque masons constructed monumental groin vaults by first creating a framework of intersecting barrel vaults, which were made from stone or brick. They meticulously designed the curves and angles to distribute weight evenly, using thick walls to support the heavy stone ceilings. The use of ribbing and pointed arches helped to enhance stability and aesthetics. This innovative technique allowed for larger, more open interior spaces in churches and cathedrals.