In the selection of subjects for engraving, attention has been principally paid to two points, excellence in the objects themselves, and certainty as to dates; but the greatest stress has been laid upon the latter. The author of a work which professes to be in any degree didactic, can never impress too strongly upon his mind the value of the Roman precept, "prodesse quàm delectare;" and an artist, accustomed by his habits to the contemplation of the beautiful and the picturesque, requires above all men to be warned on this head. Many of the buildings here represented, might easily have been exchanged for others, more perfect, more elegant, or more ornamented; but it is hoped that they could not have been exchanged for those that would have been more instructive. The main object of the publication has been to exhibit a series of specimens of Norman architecture, as they actually exist in Normandy itself; and, by taking those whose dates are best defined, to enable the antiquary and the amateur of other countries, not only to know the state of this extraordinary people, as to their arts, at the epoch of their greatest glory, but also to compare what is in Normandy with what they find at home. Another volume, devoted to the illustration of the same description of architecture, in the south of France, in Italy, and in Sicily, would fill a hiatus, whose existence has long been regretted. In Germany, Denmark, and Sweden, it is to be feared that little remains; and, thanks to the spirit of English artists and to the patronage of the English public, what is in this country is already in a great measure recorded. To an Englishman, it is hoped it may be a source of venial self-congratulation, that the first publication upon Norman architecture originates in his own island: he will likewise probably not be displeased to find, that this collection of the finest remaining specimens of Norman art upon the continent, contains nothing which he cannot rival, indeed surpass, at home. But, at the same time that the principal end proposed in this work has been to set before the public those edifices, whether sacred, military, or domestic, which were erected during the age most properly designated as Norman, the æra anterior to the union of the ducal coronet with the crown of France, it has been felt that, in whatever light the publication might be regarded, it would be incomplete without the addition of other buildings of a subsequent period. A farther number of specimens has therefore been admitted, conducting the series through the style of architecture, commonly termed Gothic, down to the time when that style finally disappeared before an Italian model, more or less debased.