A.It was damage to buildings caused by Nazi bombing during WWII that prompted the first listing of buildings, in the Town & Country Planning Act of 1947.
A.The Burj Khalifa in Dubai is 828m (2,717ft) tall and the tallest man-made structure ever built. It cost $1.5 billion to build, and opened in 2010.
Q.What was the tallest buiilding prior do 1930
A.The Eiffel Tower was the tallest building in the world until 1930. It uses 2.5 million rivets. Built between 1887 & 1889, it is 300m (986 feet) tall.
Q.How many floors does canary wharf have
A.Canary Wharf tower (One Canada Square) has 50 floors and is 770ft (235m) high. It's the UK's tallest building, but 1,947ft shorter than the Burj Khalifa.