The present church of St. Germain-des-Prés has a tower that in part predates the year 1000; it was erected by an abbot who ruled from 990 to 1014, and shows the small stones used at that period. The nave and transept, finished before the XI century closed, under a bishop of Paris who was uncle of Godfrey de Bouillon, comprise the only remaining Romanesque work in the capital. Twice in the XII century the choir was reconstructed by the monks, first about 1125, and at the same time the ancient tower's upper story was built; and again, after Suger, in 1144, had demonstrated the superiority of Gothic vaulting. St. Germain's abbot wrote, in 1163, that he had repaired his church in a new fashion. In the ambulatory the round and the pointed arch appeared side by side, and the groin vault was used simultaneously with the diagonals. The capitals were altogether Romanesque, since sculpture changed less swiftly than construction in those transitional years. Perhaps the new choir of St. Germain was not wholly finished when Pope Alexander III dedicated it in 1163, the year that the foundation stone of Notre Dame was laid. The choir's triforium arches were cut off, later, to lengthen the clearstory windows, and the nave has been revaulted.
In the abbey inclosure a Sainte-Chapelle, a cloister, and a refectory were built by Pierre de Montereau; he and his wife, Agnes, were buried in the chapel. Fragments of his work have been collected in the small garden beneath the Carolingian tower of the abbatial, as well as in the gardens of the Musée Cluny.[88] The Revolution entirely wrecked the monk's quarters.
St. Germain-des-Prés, in popular speech, was _The Abbey_. Here gathered the learned men of Paris for mental stimulus. In its priceless library, destroyed by the Revolution, worked those famous scholars Dom Luc d'Achery (d. 1685), Dom Mabillon (d. 1707), and Dom Rivet (d. 1749), whose tireless patience and scrupulous respect for historical truth made the name Benedictine a synonym for "savant." Three monumental works were begun by the XVII-century reformers who renewed the love of letters in the leading monastic houses of France: the _Acta Sanctorum_; the annals of the Benedictine Order; and that pride of French letters, the _Histoire Littéraire de la France_, which to-day the Institute of France is continuing. "_Gros livres inutiles_," Voltaire glibly called the invaluable books which for the modern school of mediæval archæology have made flesh-and-blood men of the old prelate-builders of cathedrals.