In 2012, its Tower Bridge was decorated with a set of Olympic rings.
One skyscraper in this city nicknamed the "Walkie-Talkie" drew criticism when sunlight that reflected off of it damaged nearby cars. An aircraft warning light sits atop a pyramid pinnacle on this city's One Canada Square, which was recently surpassed by the Renzo Piano-designed (*) Shard as its country's tallest building. Older structures in this city include a banqueting house at the Palace of Whitehall and the Christopher Wren-designed St. Paul's Cathedral. In 2012, its Tower Bridge was decorated with a set of Olympic rings. For ten points, identify this city where Buckingham Palace and Big Ben lie along the River Thames.
One skyscraper in this city nicknamed the "Walkie-Talkie" drew criticism when sunlight that reflected off of it damaged nearby cars.
London