Last Updated: Dec 05, 2016 Views: 40
Unfortunately, there is no definitive answer for the length of time Biagio Barzotti took to produce his micro-mosaic “Paizza S. Pietro nel momento della Benedizone Papale.” According to a late 19th century article in Ballan’s Pictorial, there is no date listed for the publication, v.11, p. 83, the usual time for micro-mosaics produced at the Vatican Mosaic Factory is between 12 to 20 years.
I also consulted the following works:
Savelli, Collezione. Mosaici minuti romani. Rome: Gangemi Editore, 2004. Print.
Whitehouse, David. The Corning Museum of Glass: a decade of glass collecting, 1990-1999. Corning, NY: Corning Museum of Glass, 2000. Print.
According to the below journal article the usual time for micromosaics produced at the Vatican Mosaic Factory was 12-20 years.
Ballan's Pictoral v. II p. 383