Polo that in Persian called Chogan, is one of the Iranians
ancient sports that was played about 2500 years ago in Achaemenidera.  
People learned to play this sport from seventeen years old.
By spreading borders of Iran by Kings of Persia that time,
this sport transferred to other cities and countries.
Shah Abbas the great the king of Iran and one of the
biggest kings of Safavid era about 500 years ago, was a professional polo player.  
About 100 years ago in Pahlavi era by having connection between
Iran and European countries, polo was considered again by Europeans.
Polo was chosen as one of the Olympic game in 1900 and was played till 1938
in Olympic. Nowadays more than 77 countries play this sport.