County Hall is a significant building located in London, England. It serves as the headquarters for the Greater London Authority and houses the offices of the Mayor of London and the London Assembly. The building was completed in 1922 and is known for its impressive architecture, featuring a grand entrance and a distinctive clock tower. Originally, County Hall was the seat of the London County Council. Over the years, it has undergone various renovations and changes in use. Today, it also hosts attractions like the London Aquarium and offers stunning views of the River Thames and the Houses of Parliament.