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.
Architecture of London
Hallmarks of Gothic architecture are tracery, a form of delicate, web-like ornamentation for windows, parapets, and all external ornamentation. Symmetry of lines, pointed arches, spires, and steep roofs are other characteristics. Cast-iron, and from the mid 19th-century mild steel were used in Gothic revival iron structures like Blackfriars Bridge (1869) and St. Pancras railway station (1868). Other significant buildings built in Gothic Revival are the Royal Courts of Justice (1882), the Midland Grand Hotel (1876) adjoining St. Pancras Station, Liverpool Street station (1875) All Saints church in Fitzrovia, and the Albert Memorial (1872) in Kensington Gardens. Even the suburbs were built in derivative Gothic Revival styles, called "Wimbledon Gothic".