HHHR Tower, also known as the Blue Tower, is a supertall skyscraper on Sheikh Zayed Road, Dubai, United Arab Emirates. The construction of the 72-floor, 317 m (1,040 ft) building started in 2006 and was completed in 2010. Designed by architect Al Hashemi, the building is residential, and its side usages are as commercial. HHHR tower is the second tallest residential building in Dubai, and fourth tallest residential building in the world, behind The Marina Torch, and Q1 tower which stands 348 m (1,142 ft) and 323 m (1,060 ft) respectively.