He also won the European gold in 1936 in the championship in Paris, which was the second distinction for Bulgaria after the world title of Nikola Petrov (Greco-Roman wrestling) from 1900.

He impressed people with his physical power and became famous for his ability to twist metal rails around his neck.

Legend has it that he fought the beast for an hour with his bare hands until he got a chance to kill the animal with his rifle later.

[2] Kolov was the first wrestler who captured professional world heavyweight wrestling championship's "Diamond Belt" twice.

[2] His most famous victories are: in New York vs. Rudy Dusek (1919), in Tokyo vs. Jiki Higen "The Strangler" (1921) and in Paris vs. Henri Deglane (1933).

He won against many famous wrestlers from that time such as Jeff Lawrence, Stanislaus Zbyszko, Jack Shirey (also called "The Lightning Man"), Rudy Dusek, Jo Stecker, Ed "Strangler" Lewis and Jim Browning.

[2] Having returned home, he spent most of his time establishing wrestling clubs by training young people, but continued to compete professionally until the last years of his life.

The new communist government, after 9 September 1944, awarded him with the high accolade "Honoured Master of Sport" posthumously.

[2] His coffin was carried by officers of the Ninth Artillery Corps from the town of Sevlievo also escorted by an honorary company of cavalry.