Built for the 1958 World's Fair, the Atomium in this Belgian city is a model of a molecule enlarged 165 billion times
It's an enormous model 
of an iron crystal built in 1958 that's both ebullient and terrifying in .... Staircase in 
the Atomium -Built for The World's Fair in Brussels circa 1958 ..... for Expo '58 
based on an iron molecule enlarged 165 billion times: the Atomium.