Input (grade 13): Laon Cathedral (Cathédrale Notre-Dame de Laon) is one of the most important examples of the Gothic architecture of the 12th and 13th centuries, earlier than the cathedrals of Sens and Notre Dame of Paris and ranking with them in importance.
Output (grade 5): It has been compared to the cathedrals of Saint - Étienne of Sens and Notre Dame of Paris.