The Pentominium is a 122-storey, 516 m (1,693 ft) supertall skyscraper under construction in Dubai, United Arab Emirates. Construction on the tower was halted since August 2011. It was designed by Andrew Bromberg of architects Aedas and funded by Trident International Holdings. The AED 1.46 billion (US$400 million) construction contract was awarded to Arabian Construction Company (ACC). The Pentominium has one of the deepest excavations done in the world, performed by Swissboring Overseas Piling Corp. Construction commenced on 26 July 2009 and, before construction stopped, the building was expected to be completed in 2013. As of May 2011, 22 floors had been completed. When completed, the Pentominium is scheduled to become the second tallest building in Dubai after Burj Khalifa, and one of