An important source about the life of Saint Servatius, albeit not a contemporary source, is Gregory of Tours' "Glory of the Confessors" and "History of the Franks". In his late 6th-century account, Gregory writes about "Aravatius" (identified by most scholars as Servatius), who was a bishop of Tongeren and died in Maastricht. According to the Frankish bishop and historian, Aravatius lived at the time when the Huns threatened Tongeren (5th century), which does not match the 4th-century dates of the synods mentioned above. It is not always clear how much of Gregory's account is history and how much is (pious) fiction. Gregory describes how Servatius, during a vigil at Saint Peter's tomb in Rome, had a vision in which the destruction of Tongeren was forecast (because of their sinfulness). Peter then handed the Keys of Heaven to Servatius, transferring to him the power to forgive sins. According to Gregory, Servatius returned to Tongeren, brought the relics of his predecessors to Maastricht, where he died and was buried alongside the Roman road, near the bridge.