A MEDIEVAL BRIDGE NEAR FLORENCE
Hidden in the green countryside near Florence in Bagno a Ripoli (FI), the small stone arch bridge over the Rignalla brook, left tributary of the river Arno, has been recently discovered. The Reclamation Consortium of Central Tuscany, the authority for the protection and maintenance of soil and waterways, has entrusted us with a research project aimed at a cognitive analysis of the bridge and a rehabilitation and functional recovery project for a pedestrian public use. The date of the laying of the foundation-stone in unknown: it is believed to be a “Roman bridge”. The historical research, also supported by the static analysis to evaluate the degree of stability of such a structure, suggests the possibility to attribute the design of the bridge to Leonardo da Vinci.

Keywords: Stone arch bridge, Masonry, Non-linear analysis.

El barrio El Jordán de la ciudad de Tunja
The present document is part of the research project ''Territory, memory and identity in the popular urban settlements: the case of the Jordan district of the city of Tunja in the second half of the 20th century (1950-1980)'', whose purposes are to know construction of identity processes, carried out by the inhabitants of this sector and promote the strengthening of community ties and the group conscience. Accordingly, the document seeks to highlight some of the practices that have contributed to the phenomenon of appropriation of space, as well as to establish the relevance of these for the construction of a neighborhood identity, in this sector of the city, taking into account the character of its inhabitants and the circumstances of the occupation process.

Key words: popular settlements, territory, neighborhood identity, memory

BRUNO VIOLI Y LA OBRA DEL EDIFICIO ''EL TIEMPO''
Bruno Violi, Italian architect has been listed as an architect of the modern movement, denomination easily justified in considering his built work and in the immense material drawings today are a valuable source for research about the origins and development of modern art in Colombia, from architecture. In search of modern principles Violi with other architects trained in Europe, working on worthwhile projects of national architecture, such as the University City in 1939, forming a stream of art that influences significantly the history of Colombian architecture, produced during the decades of the 40's buildings 70'sy currently recognized as a national heritage. Bruno Violi articulated the idea of architecture built on two fundamental entities-bearing structure and sectors closing-expressed in concrete formally different, both the construction process and the values and quality materica, grain and color. The option of Violi for the dualistic structure / closure is therefore a fundamental poetic assertion that concrete in building “El Tiempo” (1958), with the clarity and concise nature of a manifesto and reports on previous and subsequent developments of its architecture. Violi able to resolve this contradiction with the domination of technology in a new architectural order through a long and careful investigation.

Keywords
Bruno Violi, modern architecture, construction, coating, technique, structure, construction, sublime, character, printing.

MUSICALIDAD, DISONANCIA Y SILENCIO EN EL CENTRO HISTORICO DE BOGOTA'
The theme corresponds to interventions in consolidated centers. We analyzed, comparatively, two architectural projects located in the historic center of Bogota. Image 1, art museum of the Bank of the Republic of Enrique Triana and Image 2, Fondo de Cultura Económica de Rogelio Salmona. The present writing is assumed as a critical process about interventions in contemporary consolidated centers. For the development of the exercise are taken two projects in Bogota.
The prelude as a prelude to the critical exercise, it is advancing with the study of the context of the historical center, the equipment that helped consolidate, and the insertion of the urban projects; henceforth, to sustain the critical position, the work is oriented toward display relevant aspects of the work of two architects. The next step is to address the building Fund of Economic Culture of Rogelio Salmona arguing the elements that disuenan in the intervention; and the Art Museum of the Bank of the Republic of Enrique Triana as a discreet and quiet position in the center consolidated.

LA CONSERVACION DE LA ARQUITECTURA PATRIMONIAL DEL SIGLO XX
The study of the protection of the architectural heritage of the twentieth century can analyze specific cultural parameters to define the value of architecture. The focus is mainly on architecture created by architects of national and international fame. It is rather interesting to analyze also the architectural development often excluded by parameters of evaluation because it was considered of no great value. To understand the development of cities is fundamental to analyze this heritage also ignored. Is important to define the evaluation criteria of this heritage and conservation methods. In the analysis of evaluation involved political, social, economic and generated different ways of preserving this heritage.