Possibles materials amb destinació a obres portuàries a la Costa Brava (Girona)

The metodology used in the research of materials destinated to port constructions in the Costa Brava is described. This metodology follows a set of work steps. The first three allow to do a selection of the stone quarries that exist in the zone. The other steps consists in studing the materials and the characteristics of the chosen quarries and the zones closed to them, as to order them according to their utility in port constmctions. Finally, the main results obtained are explained

Parc de la Prehistòria Sis a Sidi Abderrahmane

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Marmora at the Tarraco of the Antonines: the assemblage of Sant Pau and Santa Tecla Hospital (Tarragona, Spain)

This paper presents an assemblage of marmora found during the archaeological excavation undertaken in 1992, a small part of the site where the Hospital of Sant Pau and Santa Tecla stands today, at Rambla Vella of Tarragona (Spain). Most of them are coloured marmora from a wide range of quarries: not only local (Santa Tecla stone, Alcover stone) and regional (broccatello) but also imported, such as giallo antico, pavonnazzetto, africano, portasanta, porfido rosso, serpentino, breccia di Settebasi. Even though some fine-grained, white marble fragments were also found, they are not being discussed here. Despite the small number of fragments recovered, this set is highly interesting as they were found in a clear, well-dated stratigraphical context: a soil from 125-150 AD that filled up some sort of building from Augustan times. The location of the site, on the limits of the upper part of the town, which was devoted to public areas (mainly related to the imperial worship, the provincial government and public), and the lower part of Tarraco, where the other activities (residential, colonial govern, etc) took place, is also significant. Therefore, both its location and its date are significant, as during this period the upper part of Roman Tarraco underwent major urban modifications which gave it the magnificence worthy of the capital of the largest province of the western part of Roman Empire.

The octagon, the hendecagon and the approximation of pi: the geometric design of the clypeus in the enclosure of Imperial cult in Tarraco

The ancient temple dedicated to the Roman Emperor Augustus on the hilltop of Tarraco (today’s Tarragona), was the main element of the sacred precinct of the Imperial cult. It was a two hectare square, bordered by a portico with an attic decorated with a sequence of clypeus (i.e. monumental shields) made with marble plates from the Luni-Carrara’s quarries. This contribution presents the results of the analysis of a three-dimensional photogrammetric survey of one of these clipeus, partially restored and exhibited at the National Archaeological Museum of Tarragona. The perimeter ring was bounded by a sequence of meanders inscribed in a polygon of 11 sides, a hendecagon. Moreover, a closer geometric analysis suggests that the relationship between the outer meander rim and the oval pearl ring that delimited the divinity of Jupiter Ammon can be accurately determined by the diagonals of an octagon inscribed in the perimeter of the clypeus. This double evidence suggests a combined layout, in the same design, of an octagon and a hendecagon. Hypothetically, this could be achieved by combining the octagon with the approximation to Pi used in antiquity: 22/7 of the circle’s diameter. This method allows the drawing of a hendecagon with a clearly higher precision than with other ancient methods. Even the modelling of the motifs that separate the different decorative stripes corroborates the geometric scheme that we propose.