Hadrian's Wall was begun in AD 122. A fort was built in stone at the Housesteads Roman Fort site around AD 124 overlying the original Broad Wall foundation and Turret 36B. The fort was repaired and rebuilt several times, its northern defences being particularly prone to collapse. A substantial civil settlement (vicus) existed to the south, outside the fort, and some of the stone foundations can still be seen, including the so-called "Murder House", where two skeletons were found beneath an apparently newly-laid floor when excavated.