  
       
      The Atomium
is a monument built for Expo
'58,  
       
       the 1958 Brussels World
Fair.  
       
       Designed by André
Waterkeyn, it is 102 metres ( 335 ft ) high, 
       
        with nine
steel spheres connected to form the shape of a unit cell 
       
        of an
iron crystal magnified 165 billion times. 
       | 
       
       |