York Cathedral is the largest existing medieval church in Europe and one of the most exquisite churches in design and architecture in the world. It was built in 627 AD, a wooden structure that was later destroyed by war in the Civil War. In 1066, the Normans took over York, and in 1080 the first Norman-style church was built, and the cornerstone and basement of the church can still be seen today. When you come to York, you must not miss the Cathedral of York (York Minster), the largest in the UK, and the largest Gothic church north of the entire European Alps. Construction began in 1220 and completed in the 1470s. In 1984, some buildings in York Cathedral were destroyed by a fire, which was badly damaged and has been restored. Entering York Cathedral, the most amazing is the back of the altar, a whole piece of stained glass on the east side of the church, the area is almost the size of a tennis court, is the largest medieval stained glass window in the world, the eastern stained glass window was designed between 1405 and 1408 AD, It is composed of more than 100 pictures, fully showing the wonderful process of staining, cutting and combining glass during the Middle Ages, and the architectural power of supporting the eastern walls with large glass glaze is also breathtaking.