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L’intervento conservativo sulle transenne in stucco gessoso e lapis specularis della basilica di Santa Sabina a Roma: approccio metodologico, prassi operative e studio della tecnica esecutiva

L’intervento conservativo sulle transenne in stucco gessoso e lapis specularis della basilica di Santa Sabina a Roma: approccio metodologico, prassi operative e studio della tecnica esecutiva

Authors :
Brunetto, A.
Galanti, G.
Giovannone, C.
Iaccarino Idelson, A.
Massa, V.
Pannuzi, S.
Rubino, A. R.
Serino, C.
Vischetti, F.
Source :
Hortus Artium Medievalium; May 2020, Vol. 26 Issue: 1 p60-72, 13p
Publication Year :
2020

Abstract

The Early-Medieval window-transennas from the paleochristian Basilica of Santa Sabina in Rome were recently object of a conservation project at Istituto Centrale per il Restauro. Discovered by Antonio Munoz at the beginning of the XX century, they here fixed them on wooden boards with screws. The boards were hanged on the wall of the portico and later recovered in the depots of the Basilica’s Museum. Conservation work is currently being carried out also on the other existing elements. Visual examination, 3D scanning and diagnostics allowed a deep understanding of such extremely rare artefacts. Their execution techniques were studied, appearing cast in molds in which the gypsum mortar was applied in two layers, between which the plates of lapis specularis were inserted. On the internal surface traces of Egyptian Blue were detected. Diff erent laser techniques were used to clean the surfaces, including that of the lapis specularis. Exhibition stands for the reassembled and integrated fragments were designed on a new 3D scan, minimizing the surface required for support. Structures built with carbon fibre/epoxy on milled cores are thin and rigid, use a limited amount of the external face of the transennae and allow the passage of the light through the lapis specularis.

Details

Language :
English
ISSN :
13307274
Volume :
26
Issue :
1
Database :
Supplemental Index
Journal :
Hortus Artium Medievalium
Publication Type :
Periodical
Accession number :
ejs55137258
Full Text :
https://doi.org/10.1484/J.HAM.5.121689