 Having found only part of it, Saunière continued his investigations beneath the church and in other parts of his domain.Corbu, followed by Baigent, Leigh, and Lincoln, asserts that Rennes-le-Château had been the capital of the Visigothic Kingdom "Rhedae", while other sources postulate Rhedae's hub as Narbonne.Corbu's claim can be traced back to a book by Louis Fédié entitled "Le comté de Razès et le diocèse d'Alet" (1880), that contained a chapter on the history of Rennes-le-Château; published as a booklet in 1994.