What is "kincsem"

Kincsem (; Hungarian for "My Precious" or "My Treasure"; March 17, 1874– March 17, 1887) was the most successful Thoroughbred race horse ever, having won 54 races for 54 starts. Foaled in Kisbér, Hungary in 1874, she is a national icon, and is revered in other parts of the world, too. Over four seasons she won all her races against both female and male company at various race tracks across Europe, a record still unbeaten.