Texte remanié de: Diss.--Philosophische Fakultät--Bonn--Rheinische-Friedrich-Wilhelms-Universität, 2002. / Bibliogr. p. 137-152. Notes bilbiogr. Index.

Los Angeles has long been identified as a fragmented city, by nature of its cosmology and those constructed perceptions that constitute it in the collective imaginary. In an effort to articulate, interrogate and understand such a place, we have come to rely on its representations to function as mediators of meaning, delivering through their simulation of the city an experience of the real, lived Los Angeles. As a result, the relationships between the real and the representation become skewed, altering the processes by which we engage with the everyday. To better understand the implications of this dialectic, I examine four representations of the city: Disneyland, David Hockney’s “Domestic Scene, Los Angeles,” David Gebhard and Robert Winter’s A Guide to Architecture in Southern California and the BBC “One Pair of Eyes” installment “Reyner Banham Loves Los Angeles.” By analyzing representations of Los Angeles produced in a range of media, it becomes possible to discern the complex relationships between the real and envisioned Los Angeles, and to recognize the constructive force that emerges out of this discursive space. / text

Before the publication of David Hockney’s book Secret Knowledge: rediscovering the lost techniques of the Old Masters in 2001, it was commonly believed that the first artist to use an optical aid in painting was the seventeenth-century Dutch painter Johannes Vermeer. Hockney, however, believes that the use of projected images started much earlier, as early as the fifteenth-century, claiming that evidence can be found in the work of the Flemish painter Jan van Eyck. Without rejecting Hockney’s pioneering work in this field, I nevertheless make the perhaps bolder claim that Italian artists were using the aid of image projections even before the time of Jan van Eyck, that is, as early as 1270. Although much of the information required to make an earlier claim for the use of optics can be found in Hockney’s publication, the key to linking all the information together has been missing. It is my unique contention that this key is a letter that has always been believed to have been European in origin. More commonly referred to as Roger Bacon’s Letter I show in detail how this letter was, in fact, not written by Roger Bacon, but addressed to him, and that this letter originated in China. Chinese knowledge about projected images, that is the concept that light-pictures could be received onto appropriate supports, came directly to Europe around 1250. This knowledge was expanded upon by Roger Bacon in his Opus Majus, a document which arrived in Italy in 1268 for the special consideration of Pope Clement IV. The medieval Italian painter Cimabue was able to benefit directly from this information about optical systems, when he himself was in Rome in 1272. He immediately began to copy optical projections, which stimulated the creation of a new, more individualistic, mode of representation in Italian painting from this time forward. The notion that projected images greatly contributed towards the development of naturalism in medieval Italian painting replaces the previously weak supposition that the stimulation was classical or humanist theory, and shows that it was, in fact, far likely something more technical as well. / Art History / D.Litt. et Phil. (Art History)

Before the publication of David Hockney’s book Secret Knowledge: rediscovering the lost techniques of the Old Masters in 2001, it was commonly believed that the first artist to use an optical aid in painting was the seventeenth-century Dutch painter Johannes Vermeer. Hockney, however, believes that the use of projected images started much earlier, as early as the fifteenth-century, claiming that evidence can be found in the work of the Flemish painter Jan van Eyck. Without rejecting Hockney’s pioneering work in this field, I nevertheless make the perhaps bolder claim that Italian artists were using the aid of image projections even before the time of Jan van Eyck, that is, as early as 1270. Although much of the information required to make an earlier claim for the use of optics can be found in Hockney’s publication, the key to linking all the information together has been missing. It is my unique contention that this key is a letter that has always been believed to have been European in origin. More commonly referred to as Roger Bacon’s Letter I show in detail how this letter was, in fact, not written by Roger Bacon, but addressed to him, and that this letter originated in China. Chinese knowledge about projected images, that is the concept that light-pictures could be received onto appropriate supports, came directly to Europe around 1250. This knowledge was expanded upon by Roger Bacon in his Opus Majus, a document which arrived in Italy in 1268 for the special consideration of Pope Clement IV. The medieval Italian painter Cimabue was able to benefit directly from this information about optical systems, when he himself was in Rome in 1272. He immediately began to copy optical projections, which stimulated the creation of a new, more individualistic, mode of representation in Italian painting from this time forward. The notion that projected images greatly contributed towards the development of naturalism in medieval Italian painting replaces the previously weak supposition that the stimulation was classical or humanist theory, and shows that it was, in fact, far likely something more technical as well. / Art History / D.Litt. et Phil. (Art History)

Artemisia Gentileschi and Caravaggio's Looking Glass is an ironic allusion to both the concave mirror and the biconvex lens. It was these simple objects, in colloquial terms a shaving mirror and a magnifying glass, which Artemisia Gentileschi and her father Orazio, learned from Caravaggio how to use to enhance the natural phenomenon of the camera obscura effect. Painting from a projection meant that Artemisia could achieve an extreme form of realism and detail in her work. This knowledge, which was of necessity kept hidden, spooked the Inquisition and also gave artists, who knew how to manipulate the technology, an extreme competitive edge over their rivals. This dissertation challenges the naive assumptions that have been made about Artemisia's working practices, effectively ignoring the strong causal links between art and science in Seicento Italian painting. Introducing the use of optical aids by Artemisia opens up her story to a whole new generation of scholarship. / Art History / M.A. (Art history)

Artemisia Gentileschi and Caravaggio's Looking Glass is an ironic allusion to both the concave mirror and the biconvex lens. It was these simple objects, in colloquial terms a shaving mirror and a magnifying glass, which Artemisia Gentileschi and her father Orazio, learned from Caravaggio how to use to enhance the natural phenomenon of the camera obscura effect. Painting from a projection meant that Artemisia could achieve an extreme form of realism and detail in her work. This knowledge, which was of necessity kept hidden, spooked the Inquisition and also gave artists, who knew how to manipulate the technology, an extreme competitive edge over their rivals. This dissertation challenges the naive assumptions that have been made about Artemisia's working practices, effectively ignoring the strong causal links between art and science in Seicento Italian painting. Introducing the use of optical aids by Artemisia opens up her story to a whole new generation of scholarship. / Art History / M.A. (Art history)