A new skyscraper is set to join the City of London's world-famous collection of oddly designed buildings with novelty names. With 73 stories, the Trellis will rival the Shard in height, and overshadow its next-door neighbors, the Gherkin, the Walkie-Talkie and the Cheesegrater. If all goes to plan, the tower will rise from the rubble of the existing Aviva building at 1 Undershaft, sometime in the 2020s.