Pompeii, Its Life and Art. August 1840-1909 Mau
with every two or three courses of brick. An example of the opus mixtum is seen in the entrances of the Herculaneum Gate (Fig. 113). Rubble work is the prevailing masonry at Pompeii; in comparison the other kinds described may be considered exceptional.
The reticulate work, opus reticulatum, formed the outer surface of a wall, the inner part of which was built up with rubble. It was composed of small four-sided pyramidal blocks, of which only the base, cut square and smooth, showed on the surface; the tapering part served as a key to bind the block into the wall. These blocks, which measured from three to four inches square at the base, were laid on their corners, so that the edges ran diagonally to the horizontal and vertical lines of the wall; the pattern thus formed had the appearance of a net, hence the name. The material was in most cases gray, occasionally yellow, tufa. The corners and doorposts were at first made of the same kind of stone cut in the shape of bricks; later of bricks. This style of masonry was in vogue at Rome, and apparently also at Pompeii, in the time of Augustus (Fig. 12; see also the pedestal in the foreground of Plate I).
The quasi-reticulate work belongs to the early years of the Roman colony. In appearance it lies between rubble and reticulate work, differing from the latter in that the small blocks are less carefully finished and are laid with less regularity. The material is generally lava, but tufa and limestone are also found. The corners and doorposts are of brick, or of brick-shaped blocks of tufa or limestone (Fig. 11).
Ashlar work, of carefully hewn oblong blocks laid in courses, is found in the older portions of the city wall (Fig. 109) and in the walls of the Greek temple in the Forum Triangulare; it was used otherwise only for the fronts of houses (Fig. 10). The material in the earliest times was Sarno limestone, later gray tufa. With the coming of the Roman colony ashlar work went out of use, even for the corners of houses and doorposts.
In the construction of columns and many architraves large blocks were used. Previous to the time of the Roman colony these were of gray tufa, or, in rare instances, of limestone; a coating of white stucco was laid on the surface. From the advent of the colony to the time of the Early Empire, the whitish limestone was used; after that, Carrara marble.
Bearing in mind the styles of construction just described, we may now turn to the architectural history of Pompeii, which, as we shall see, falls naturally into six periods.
The first period is that to which the Doric temple in the Forum Triangulare and the city walls belong. From the style of the temple, we may safely conclude that it was built in the sixth century B.C.; the evidence is too scanty to enable us definitely to fix the date of the walls. The building materials used were the Sarno limestone and gray tufa.
The second period may be designated as the Period of the Limestone Atriums, so characterized from the peculiar construction of a number of houses found in different parts of the city. On the side facing the street these houses have walls of ashlar work of Sarno limestone (Fig. 10), but the inner walls are of limestone framework (Fig. 9).
Fig. 10.—Façade of Sarno limestone, house of the Surgeon.
Almost no ornamental forms belonging to this period have come down to us; so far only a single column has been found, built into the wall of a house. It is of the Doric style, and once formed part of a portico that ran along the west side of the small open space at the northwest corner of Stabian and Nola streets; it is thus the sole remnant of a public building. In the only complete house that has survived from this period, the house of the Surgeon, there was a portico in front of the garden, but the roof was supported by square pillars, not by columns. There is no trace of wall painting.
Characteristic as the construction of the limestone atriums is, it is difficult to determine to what age they belong. The beginning of the period cannot be determined even approximately. The end, however, is fixed by the earlier limit of the next period, the Second Punic War. We may, therefore, assign the houses with the limestone atriums to a period just preceding this war; reckoning in round numbers, they were built before 200 B.C.
In the third, or Tufa Period, came the climax of the development of Pompeian architecture prior to the Roman domination. The favorite building material was the gray tufa.
With the exception of the Greek temple mentioned above, all the public buildings of Pompeii that do not belong to the time of the Roman colony have a homogeneous character; a list of them would include the colonnade about the Forum, the Basilica, the temples of Apollo and of Jupiter, the Large Theatre with the colonnades of the Forum Triangulare and the Barracks of the Gladiators, the Stabian Baths, the Palaestra, and the outer part of the Porta Marina with the inner parts of the other gates. Closely associated with these public edifices is a large number of private houses; as a specially characteristic example, we may mention the house of the Faun.
All these buildings are similar in style and construction; they evidently date from a period of great building activity. It must also have been a period of peace and prosperity; for the whole city, from the artistic and monumental point of view, underwent a transformation. Certain Oscan inscriptions, an early Latin monumental inscription, and a few words, dating from 78 B.C., scratched upon the plaster of the Basilica, oblige us to place the Tufa Period before the time of the Roman colony; yet not long before, for the next oldest buildings date from the first years of the colony. The time of peace that furnished the background for the period can only have been that between the Second Punic War and the Social War, about 200 to 90 B.C.; the Tufa Period was approximately the second century before Christ.
In marked contrast with the Period of the Limestone Atriums, the Tufa Period has a pronounced artistic character. It is preëminently a period of monumental construction. Buildings and public places are adorned with colonnades of the Doric, Ionic, and Corinthian orders. The simple and beautiful forms of the Greek architecture are used, sparingly indeed, but without petty detail and with evident fear of excessive ornamentation. Columns and architraves are white, with only slight suggestion of the earlier Greek polychrome decoration. A variety of color, however, is laid on the walls, and with this period the history of Pompeian wall decoration begins.
The Tufa Period coincides throughout with the time of the first style of decoration. This, known as the Incrustation Style, aimed to imitate in stucco the appearance of a wall veneered with colored marbles. Wall paintings are wholly lacking, but pictures, often of rare beauty, are found in the mosaics of the floors. In this period, we may truly say that Pompeian architecture was at its best. With it the pure Greek tradition dies out; all the buildings of later times bear the Roman stamp.
The buildings of the Tufa Period are easily recognized by the unobtrusiveness of the materials used in their construction. The rubble work is mostly of lava; but gray tufa was used exclusively, not only for ashlar work in façades, but also for columns and entablatures. The surface of the tufa was coated with a layer of fine white stucco, which gave it the appearance of marble. The use of marble for building purposes, however, is foreign to this period; and it speaks well for the culture of the Oscan Pompeians that they had pleasure in beauty of form above richness of material.
The fourth period covers the earlier decades of the Roman colony, from 80 B.C. to near the end of the Republic. According to inscriptions which are still extant, soon after the year 80 a wealthy colonist, Gaius Quinctius Valgus, when duumvir with Marcus Porcius as colleague, built the Small Theatre, and afterwards, when quinquennial duumvir with the same colleague, the Amphitheatre also. Both structures have the quasi-reticulate facing (Fig. 11); and several other buildings in which the same style of masonry is found without doubt belong to the same period—the Baths near the Forum, the temple of Zeus Milichius, a building just inside the Porta Marina, and apparently the hall at the southeast