The Darley Arabian is one of the three foundational sires of the modern Thoroughbred horse breed. Bred in the early 18th century, he was imported to England from the Middle East. His lineage is traced back to the Arabian horse, known for its speed, endurance, and agility. This stallion significantly influenced horse racing and breeding practices. The Darley Arabian is recognized for passing on desirable traits, including athleticism and temperament, to his descendants. Today, many Thoroughbreds can trace their ancestry back to him, making him a key figure in equine history.