The present site of Glasgow has been settled since prehistoric times, being the furthest downstream fording point of the River Clyde, at its confluence with the Molendinar Burn. The Romans built outposts in the area and constructed the Antonine Wall to keep Roman Britannia separate from Celtic and Pictish Caledonia. Items from the wall, such as altars from Roman forts, including Balmuildy, can be seen in the Hunterian Museum.