Ely is a cathedral city in England, located in the county of Cambridgeshire. It is known for its magnificent cathedral, which dates back to the 11th century and is one of the most impressive examples of Norman architecture in the country. The city is also home to a number of other historic buildings, including the Bishop's Palace and St Mary's Church. Ely has a population of around 20, 000 people and is a popular tourist destination.