While some modern sources report him also to have studied under Federico Grisone – also a nobleman of Naples – or Cesare Fiaschi of Ferrara, there is no documentary proof that he did so.

[1]: xix Unlike his many of his contemporaries or successors – Grisone, Fiaschi, Pasquale Caracciolo, Claudio Corte, Pirro Antonio Ferraro, Giovanni Paolo d'Aquino, Paolo de' Pavari – who published treatises on various aspects of horsemanship, many of which were soon translated and circulated through much of Europe, Pignatelli never had any work published.

It was divided into three hundred and seventy-six chapters,[4]: 391  and included sections on cures for parasites and disease, on bridling and on horse management.

[1]: xxxi Through his influence on de La Broue and de Pluvinel – who became riding-instructor to the king of France and in 1594 started the first riding academy in the country – Pignatelli shaped the development of the art of classical dressage, which diffused through Italy and France, but also to England, to the German-speaking world, to Scandinavia, and eventually to the Iberian peninsula.

[1]: xxii [2] In 1576 Prospero d'Osma, who had been a pupil and a collaborator of Pignatelli, was commissioned by Robert Dudley, Earl of Leicester, to prepare a report on the state of Queen Elizabeth's royal stables; d'Osma later opened a riding school in the Mile End district of London.