Gothic architecture
Sens Cathedral (begun between 1135 and 1140) was the first Cathedral to be built in the new style (St. Denis was an abbey, not a Cathedral). Other versions of the new style soon appeared in Noyon Cathedral (begun 1150); Laon Cathedral (begun 1165); and the most famous of all, Notre-Dame de Paris, where construction had begun in 1160.
Picardy
Picardy is the birthplace of Gothic architecture, housing six of the world's greatest examples of Gothic cathedrals, which span the history of Gothic architecture in its entirety. Amiens Cathedral, standing as the largest cathedral in Europe, which according to John Ruskin is the "Pantheon of Gothic architecture", could house the Notre-Dame de Paris twice over. It was built in as little as 50 years. Picardy also holds the tallest transept in the history of the Gothic period; this transept is located on Saint-Pierre cathedral in Beauvais, Oise.