centre of bronze working - http://forums.civfanatics.com/showth...79#post1747379
stonehenge - http://forums.civfanatics.com/showth...threadid=84534
linear B tabulate - http://forums.civfanatics.com/showth...threadid=84700
bison of altamira - http://forums.civfanatics.com/showth...threadid=83463
maiden castle - not yet
stonehenge - http://forums.civfanatics.com/showth...threadid=84534
linear B tabulate - http://forums.civfanatics.com/showth...threadid=84700
bison of altamira - http://forums.civfanatics.com/showth...threadid=83463
maiden castle - not yet