Caspian Horse, also known by other names such as Gil Horse, Khazar Horse, Mazandarani Horse, Gilan Horse or King Horse, dating back more than 5,000 years, is one of the oldest breeds of horses available. Caspian Horse exclusively existed in Iran until 1956.

This breed is the primary ancestor of all the warm-blooded horses in the world. The image of these horses is seen in the paintings of Apadana staircase in Persepolis, on the seal of Dariush the Great, in the Naqsh-e Rostam and the Naqsh-e Shapur.

The horse was in extinction for a while until it was accidentally identified in the 1930s by Ms. Louise Firouz with the real name of Louise Laylin (born 24 December 1933 in Washington, D.C. and died May 25, 2008 in Gonbad e Kavus). In a short time, based on her studies and researches on this species, Ms. Firouz was able to introduce and register this type of Iranian small horse as a unique breed in international horse breeding societies

Caspian Horse Genetic Resources Storage Complex in Rasht has been opened by the Research, Education and Extension Organization of the Ministry of Agriculture jihad of Iran. In order to introduce this unique species, the Caspian Horse World Summit was held in Rasht city and Gilan province, the primary origin of this beautiful horse, after America, England and Sweden.

The expansion of the Caspian horse breed to other parts of the world began with the arrival of the first Caspian horse to Virginia, America, and now this beautiful and unique species can be seen around the world.
https://en.wikipedia.org/wiki/Louise_Firouz
https://caspianhorse.org/fa/لوئیز فیروز