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.
Gothic Revival architecture in Canada
The Gothic Revival style started to wane in popularity in the late 19th century. New technologies such as steel building frames, elevators, and electric lighting were having a considerable impact on how buildings could be used and constructed. Newer styles such as the Beaux-Arts and Art Deco came to prominence. However, this was much less true in Canada. Gothic Revival architecture continued to be one of the most important building styles well into the 1940s, though often in highly modified and original forms. Just before the First World War Toronto saw work begin on three of its best known neo-Gothic structures, Casa Loma, the CHUM-City Building, and Hart House. While the three buildings were erected for completely different purposes, and a very distinct in style, they are all clearly Gothic in inspiration.