At every time, however, even when his work went on most briskly, the labours of the Roman architect took the direction of restoring and readorning old churches rather than of erecting new ones. While the Transalpine countries, except in a few favoured spots, such as Provence and part of the Rhineland, remained during several ages with few and rudely built stone churches, Rome possessed, as the inheritance of the earlier Christian centuries, a profusion of houses of worship, some of them still unsurpassed in splendour, and far more than adequate to the needs of her diminished population. In repairing these from time to time, their original form and style of work were usually as far as possible preserved, while in constructing new ones, the abundance of models beautiful in themselves and hallowed as well by antiquity as by religious feeling, enthralled the invention of the workman, bound him down to be at best a faithful imitator, and forbade him to deviate at pleasure from the old established manner. Thus it befel that while his brethren throughout the rest of Europe were passing by successive steps from the old Roman and Byzantine styles to Romanesque, and from Romanesque to Gothic, the Roman architect scarcely departed from the plan and arrangements of the primitive basilica. This is one chief reason why there is so little of Gothic work in Rome, so little even of Romanesque like that of Pisa. What there is appears chiefly in the pointed window, more rarely in the arch, seldom or never in spire or tower or column. Only one of the existing churches of Rome is Gothic throughout, and that, the Dominican church of S. Maria sopra Minerva, was built by foreign monks. In some of the other churches, and especially in the cloisters of the convents, instances may be observed of the same style: in others slight traces, by accident or design almost obliterated[343]. [Sidenote: Destruction and alteration of the old buildings:] [Sidenote: By invaders.] [Sidenote: By the Romans of the Middle Ages.] [Sidenote: By modern restorers of churches.]