 Extensive crossing with Thoroughbred and other breeds has led to a more athletic type, the "Maremmano migliorato", or "Improved Maremmano".The history of the Maremmano breed is not fully known, but it is thought that they were developed from North African stock that was combined with Spanish, Barb, Neapolitan and Arabian blood.During the 19th century, Thoroughbred, Norfolk Roadster and other blood was probably added.