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iron
it was built with White Porcelain Bricks Inter-laid with Coloured stones
carbon steel and some of it has to be heat treated there is only a select few of tower crane manufactures that has the stamps to build them
Concrete, glass, wood and steel were used to build the Calgary tower.
Sandstone was used for Victory Tower in Chittigarh.
Elephants were not used to build the Eiffel tower.
Wrought iorn Steel and The primary material is wrought iron, not steel.
metal :)
The Eiffel Tower Was Made Entirely Out Of Metal
The present London Bridge is a pre-stressed concrete box girder bridge.
metal