In 1482 Leonardo Da Vinci was challenged to build the largest equestrian statue the world had ever seen. Despite the legendary artist and his patron’s best efforts, the monumental Cavallo dello Sforza would not become reality until a retired airline pilot from Pennsylvania took it on as his own personal mission. Charles Dent was a retired pilot and collector of Renaissance art who lived in Allentown, Pennsylvania. In 1977, he read about Leonardo Da Vinci’s recovered notebooks and the story of the never-built horse in National Geographic, and decided to…