Authors have differed strangely regarding the remains of the church erected by the Norman Dukes. Some of them, and indeed the greater number, assert that no small part of the structure now in existence belonged to the building consecrated by Maurilius: others maintain, that not one stone of this latter has been left upon another. The truth seems to be, that a small portion of the eastern side of the present northern tower, known by the name of the tower of St. Romain, is really of Norman workmanship, but that nothing else throughout the cathedral is so, excepting, possibly, the lateral doorways in the western front. The whole of the tower just mentioned, up to its highest tier of windows, is evidently the most ancient part of the building, and is apparently of the architecture of the latter part of the twelfth century. The church, considered collectively, is so obviously the work of different æras, that there can be little risk in hazarding the assertion, that it has been raised by piece-meal, on various occasions, as may either have been suggested by the piety of potentates and prelates, or may have been required by the state of religion or of the edifice itself. What is known as to the dates of the building is, that the southern tower was begun in 1485, and completed in 1507; that the first stone of the central portal was laid in 1509; and that the Lady-Chapel, though commenced during some of the earliest years of the fourteenth century, and finished in the middle of the fifteenth, contains work of the year 1538. At this last period, Cardinal Georges d'Amboise restored the roof of the choir, which had been injured in 1514, by the destruction of the spire. The square short central tower was erected A.D. 1200: it replaced one that had been damaged eighty years before, when the original stone spire of the church was struck by lightning. From that time forward, no attempt had been made to rebuild the spire, except with wood, of which material, that now in existence is the second. The first was destroyed by a fire, occasioned by the negligence of plumbers, in the beginning of the sixteenth century; the present suffered material injury from a similar accident, in 1713, and narrowly escaped entire destruction.