Trajan's Column

Trajan's Column (Italian: Colonna Traiana) is a Roman triumphal column in Rome, Italy, which commemorates Roman emperor Trajan's victory in the Dacian Wars. It was probably constructed under the supervision of the architect Apollodorus of Damascus at the order of the Roman Senate. It is located in Trajan's Forum, built near the Quirinal Hill, north of the Roman Forum. Completed in 113 CE, the freestanding column is most famous for its spiral bas relief, that artistically describes the epic wars between the Romans and Dacians (101102 and 105106). Its design has inspired numerous victory columns, both ancient and modern.The structure is about 30 metres (98 ft) in height, 35 metres (125 ft) including its large pedestal. The shaft is made from a series of 20 colossal Carrara marble drums, each weighing about 32 tons, with a diameter of 3.7 meters (11 ft). The 190-metre (625 ft) frieze winds around the shaft 23 times. Inside the shaft, a spiral staircase of 185 stairs provides access to a viewing platform at the top. The capital block of Trajan's Column weighs 53.3 tons, which had to be lifted to a height of ca. 34 m. Ancient coins indicate preliminary plans to top the column with a statue of a bird, probably an eagle, but after construction a statue of Trajan was put in place; this statue disappeared in the Middle Ages. On December 4, 1587, the top was crowned by Pope Sixtus V with a bronze figure of St. Peter, which remains to this day.

Frieze
Roman carroballista, a cart-mounted field artillery weapon (relief detail)A continuous frieze winds up around the tower from base to capital. The relief portrays Trajan's two victorious military campaigns against the Dacians; the lower half illustrating the first (101-102), and the top half illustrating the second (105-106).The two sections are separated by a personification of Victory writing on a shield flanked on either side by Trophies. Otherwise, the scenes on the frieze unfold continuously and in tipped-up perspective. The imagery is not realistic as the sculptor pays little attention to perspective. Often a variety of different perspectives are used in the same scene, so that more can be revealed (e.g., a different angle is used to show men working behind a wall).The scenes depict mostly the Roman army in military activities such as setting out to battle and engaging the Dacians, as well as constructing fortifications and listening to the emperor's address and the success he accomplished. The carvings are crowded with sailors, soldiers, statesmen and priests, showing about 2,500 figures in all and providing a valuable source of information for modern historians on Roman and barbaric arms and methods of warfare (such as forts, ships, weapons etc.). The relief shows such details as a ballista or catapult for example. The emperor Trajan, depicted realistically in the Veristic style, makes 59 appearances among his troops.

Spiral stair
(Section view of the pedestal and the interior stairway)

The interior of Trajan's column is hollow: entered by a small doorway at one side of the base, a spiral stair of 185 steps gives access to the platform above, having offered the visitor in antiquity a magnificent view over the surrounding Trajan's forum; 43 window slits illuminate his ascent. The column stands 38.4 m high from the ground to the top of the statue base: Located immediately next to the large Basilica Ulpia, it had to be constructed sufficiently tall in order to function as a vantage point, and to maintain its own visual impact on the forum.The column proper, that is the shaft without the pedestal, the statue and its base, is 29.76 m high, a number which almost corresponds to 100 Roman feet; beginning slightly above the bottom of the base, the helical staircase inside measures a mere 8 cm less. The column is composed of 29 blocks of Luna marble, weighting in total more than 1100 t. The spiral stair itself was carved out of 19 blocks, with a full turn every 14 steps; this arrangement required a more complex geometry than the more usual alternatives of 12 or 16. The quality of the craftsmanship was such that the staircase is practically even, and the joints between the huge blocks still fit accurately. Despite numerous earthquakes in the past, the column today leans at an angle of less than half a degree. Apart from the practical advantages it offered, the design also became closely associated with imperial power, being later adopted by Trajan's successors Antoninus Pius and Marcus Aurelius.

In Napoleon's time, a similar column decorated with a spiral of relief sculpture was erected in the Place Vendme in Paris to commemorate his victory at Austerlitz.

The inscription at the base of the column in finest lettering reads: SENATVSPOPVLVSQVEROMANVS IMPCAESARIDIVINERVAEFNERVAE TRAIANOAVGGERMDACICOPONTIF MAXIMOTRIBPOTXVIIIMPVICOSVIPP ADDECLARANDVMQVANTAEALTITVDINIS MONSETLOCVSTANT<ISOPER>IBVSSITEGESTVS

Construction

Erection of the Vatican obelisk in 1586 by means of a lifting tower. A similar arrangement was presumably used for the construction of Trajan's Column, but with less available space and thus manpower. It is assumed that the column drums were lifted by cranes into their place. Ancient sources, as well as a substantial corpus of archaeological evidence, prove that Roman engineers were capable of raising large weights clear off the ground. The typical drum of Trajan's Column weighs ca. 32 t, while the capital, the heaviest block above base and pedestal, is even at 53.3 t, which had to be lifted 34 m high. To save weight, the treads had probably been carved out before either at the quarry or in situ. Even so, for such loads the typical Roman treadwheel crane, which, moreover, could only reach a maximum height of 15 to 18 m, was clearly inadequate. Instead, a tower-like wooden construction was erected around the building site, in the midst of which the marble blocks were raised by a system of pulleys, ropes and capstans; these were powered by a large workforce of men and possibly also draught animals, spread out on the ground. According to modern calculations, eight capstans were needed to hoist the 55 t base block, while the length of rope required for the highest drums measured some 210 m assuming two-block pulleys. Such a lifting tower was later also used to great effect by the Renaissance architect Domenico Fontana to relocate obelisks in Rome. From his report, it becomes obvious that the coordination of the lift between the various pulling teams required a considerable amount of concentration and discipline, since, if the force was not applied evenly, the excessive stress on the ropes would make them rupture. In case of Trajan's column, the difficulties were exacerbated even further by the simultaneous work on the

neighbouring Basilica Ulpia, which limited the available space so that the capstan crews had proper access only from one side.

Purpose
It was traditionally thought that the Column was a propagandistic monument, glorifying the emperor's military exploits. However, the structure would have been generally invisible and surrounded by the two libraries in Trajan's Forum, and because of the difficulty involved in following the frieze from end to end, it could be said to have had much less propaganda value. On the other hand, as Paul Veyne notes, the relief could be read "vertically" from below, with the stereotypical, highly recognizable figure of the emperor recognizable across the bands of images just as, on the Colonne Vendme, Napoleon's figure can be picked up, scene after scene. Also, the two libraries surrounding it provide a platform to view the column from if the viewer stood on the top floors, making the frieze much more visible all the way up.After Trajan's death in 117, the Roman Senate voted to have Trajan's ashes buried in the Column's square base which is decorated with captured Dacian arms and armor. His ashes and those of his wife, Plotina, were set inside the base in golden urns. (The ashes no longer lie there.)

Dimensions

Height of base: 1.7 m + Height of shaft: 26.92 m o Typical height of drums: 1.521 m o Diameter of shaft: 3.695 m + Height of capital: 1.16 m = Height of column proper: 29.78 m o Height of helical part of stair: 29.68 m (~ 100 Roman feet) Height of column, excluding plinth: 28.91 m + Height of pedestal, including plinth: 6.16 m = Height of top of column above ground: 35.07 m