The Spanish Walls(Mura Spagnole)of Milan was built between 1546-1560.Ordered by the Spanish governor of the city FERRANTE GONZAGA.The wall system had an overall perimeter about 11 kms,larger than the medieval walls.Several traits of them was reinforced by moats obtained by the numerous canals surrounding the city.The SPANISH WALLS perimeter correspond to what is known as the CERCHIA DEI BASTIONI (bastion ring).The Walls remained in the 19th century lost their militray purpose in the mid 18th century.The rests of the walls nowdays are visible from the part of the city called PORTA ROMANA to end closer to 24th of May square.