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.
Thomas Harrison (architect)
Some of Harrison's designs, including his buildings at Lancaster Castle, were Gothic in style, but most were Neoclassical, particularly those at Chester Castle. He was regarded at the time, and since, as a major influence in the emergence of the Greek Revival in British architecture. A bridge he designed at the start of his career, and another towards the end of his career, incorporated innovative features; Skerton Bridge was the first substantial bridge in England to have a flat roadway, and the Grosvenor Bridge was the longest single-arched masonry bridge in the world at the time of its construction. Many of Harrison's structures have survived, most of them now designated by English Heritage as listed buildings. Despite his work being nationally admired he spent his entire career in northwest England, visiting London only occasionally; most of his buildings were in Lancashire, Cheshire, and the nearby counties.