The Dome, located on the Greenwich peninsula in London, was originally constructed to house the Millennium Experience exhibition, marking the start of the 21st century. The distinctive structure features twelve 100-metre-high support towers, symbolising either the months of the year or the hours of a clock, and has a diameter of 365 metres to represent each day of the year. In 2005, it was repurposed and reopened as The O2, serving as a major entertainment venue.