Like Lyons, Tours has eminent ecclesiastical memories. The shrine of St. Martin, the most popular saint of Gaul, made the city a frequented pilgrimage for Europe. Gregory of Tours, who ruled this see from 573 to 595, has described the richness of the Byzantine church that stood over the tomb of the great thaumaturge. Like most of the prelates who saved Latin civilization from the Barbarian's submersion, Bishop Gregory was of Gallo-Roman stock, of a senatorial family of Auvergne who boasted descent from an early Christian martyr of Gaul. In the present southwest tower of la Gatienne are traces of the VI-century cathedral built by this bishop-historian of Gaul, whose pages are a chief source for Merovingian times.[154] The city of Tours always had two great monuments--the cathedral within the ramparts, the basilica of St. Martin outside the walls. St. Martin's abbey was the nation's intellectual leader when the Saxon scholar Alcuin became its abbot (796-804). He made of Tours a Christian Athens. They buried him in his abbatial, where four years earlier Charlemagne's wife, Luitgarde, had been laid. To-day only two towers stand of St. Martin's basilica--the Tour Charlemagne, begun by the Blessed Hervé, abbot in 997, hence one of the oldest memorials of the rebirth of architecture associated with the year 1000, and a former façade tower mainly of the XII century. One of the busiest streets of Tours runs up what once was the nave of the abbatial, but, not discouraged, the people of Touraine have erected a new Byzantinesque basilica of St. Martin on the site of the transept's southern arm. Those two tragic frenzies of forgetfulness, 1562, that scattered St. Martin's ashes--for which St. Eloi, bishop-goldsmith of Noyon, had made a priceless reliquary--and 1793, that laid in ruins his church in Tours and Marmoutier's Apogee Gothic abbatial that marked the rock-hewn cells where he had lived a hermit across the Loire, those two blind hours when men thought to erect barriers between themselves and their past, destroyed monuments which, did they exist still, would rank Tours, architecturally, among the first cities of Europe. St. Martin's church, built by Hervé, became a _monument-type_,[155] copied by Ste. Foi, Congnes, St. Martial, Limoges, St. Sernin, Toulouse, and the cathedral at Santiago.