Several recent and ongoing major works by Gehry around the world include the Dr Chau Chak Wing Building in the University of Technology Sydney, completed in 2014. The Chau Chak Wing, with its 320,000 bricks in "sweeping lines" is described as "10 out of 10" on a scale of difficulty. An ongoing project is the Guggenheim Abu Dhabi on Saadiyat Island in the United Arab Emirates. Other significant projects such as the Mirvish Towers in Toronto, and a multi-decade renovation of the Philadelphia Museum of Art are currently in the design stage. In October 2013, Gehry was appointed joint architect with Foster + Partners to design the "High Street" phase of the development of Battersea Power Station in London, Gehry's first project there.