When did thoroughbred horses get pedigrees?

It must be said that purebred Arab and English horses are considered purebred, the origin of both on the paternal and maternal lines can be traced back to the entries in the Main Studbook. It is a horse pedigree book that has been maintained in England since 1793.

It includes horses that have among their ancestors one of the three Arabian stallions brought from the East to England in the late 17th - early 18th centuries (their names are Darley Arabian, Beverly Turk and Godolphin Arabian), as well as those that for many years they have achieved the highest results at the most prestigious races.