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).
Matilo was erected there, at the meeting place of the Oude Rijn and the newly dug canal, because of its strategic importance.
[5] Archaeological evidence seems to suggest that the Romans only constructed the fort itself somewhere at around 70 AD, whereas a small watchtower might have taken its place in the years before.
[6] The construction of Matilo therefore immediately followed the Batavian Rebellion in 69 and as such played an important role in restoring order to the province of Germania Inferior.