Building
200
This famous Egyptian tomb has a square bottom and four triangle sides.
Pyramid
400
This tall iron tower in Paris was built for a big world fair in 1889.
Eiffel Tower
600
This beautiful white marble building in India was built by an emperor for his wife.
Taj Mahal
800
This huge old round stadium in Rome was used for gladiator fights.
Colosseum
1000
This building in Rome features the world's largest unreinforced concrete dome, which has stood strong for nearly 2,000 years thanks to a technique of using lighter volcanic stone towards the top.
Pantheon
