Pisoraca and the Legio IIII Macedonica Historical milestone · Herrera de Pisuerga, La Ojeda, Palencia Image of Herrera de Pisuerga, not of the place itself. Herrera occupies the site of ancient Pisoraca, where the Legio IIII Macedonica was quartered during the first century; excavations have brought to light remains of the legionary camp beneath the urban centre. siglo I Photo: Valdavia (CC BY-SA 3.0) What to see and do in Herrera de Pisuerga