Matilo or Matilone was once a Roman fort (castellum) in modern-day Leiden. Positioned on the southern banks of the Oude Rijn, it served to protect the Roman borders in the province of Germania inferior (Limes Germanicus). On the Peutinger map, it lies between the encampments of Albaniana (Alphen aan den Rijn) and Praetorium Agrippinae (Valkenburg). The seventh-century Ravenna Cosmography gives its name as Matellionem.