What is the Tower Bridge built of?
The Tower of London was built with the use of poor quality Reigate stone. You can follow the history and the repair work that has been on going for hundreds of years. See the link below.//// http://www.hrp.org.uk/aboutus/whatwedo/buildingconservation/the tower Bridge is below:http://wiki.answers.com/Q/What_materials_were_used_to_build_the_Tower_Bridge#page1
11,000 tons of steel, stone, and granite.
11,000 tons of steel, clad in Cornish granite and Portland stone.