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.
Czech Gothic architecture
The oldest Gothic building in Prague is the Convent of St. Agnes founded in 1231 by the Bohemian Princess Agnes of Bohemia (later canonized). It was the first convent of the Poor Clares outside Italy. The first church of this convent (St. Francis Church) was completed in 1234 and it is said to be the oldest vaulted mendicant order church north of the Alps. The Church of Christ the Saviour built in 1261–1265 as the royal mausoleum of Přemyslid dynasty by King Ottokar II of Bohemia was directly influenced by the French Gothic architecture.