I found these in a flea market in Florence, set of 3 antique image by photographer, Giacomo Brogi, 1822-1881.I do not know the age, they appear to have been mounted on a piece of cardboard. These are very collectible images and RARE, his work is found in museums all over Italy. However, his name has been cut off of these when someone mounted them. You can find the images online as I have sighted below...
I have found Brogi's images online and you can read about more from Wikipedia, which sites the images from the English: Collection: A. D. White Architectural Photographs, Cornell University Library
Photo 2 is Florence. Statue of Dante and church of Santa Croce, measures 8 1/4 x 10, catalog # 3033
https://commons.wikimedia.org/wiki/File:Florence._Statue_of_Dante_and_church_of_Santa_Croce_(3611959340).jpg
Photo 3 is Milan. Exterior of the Duomo, measures 11 x 12 catalog #4591
https://commons.wikimedia.org/wiki/Category:Historical_images_of_the_Duomo_(Milan)_-_exterior#/media/File:Brogi,_Giacomo_(1822-1881)_-_n._3824_-_Milano_-_Parte_posteriore_della_Cattedrale.jpg
Photo 4 is hard to read, I can see it has a catalog number of 4280, and cannot find the image anywhere. It is Saint Peter's Basilica' This ancient statue of St. Peter, in Rome, Vatican City. I have found other Vatican photos of Brogi's but not this one. Measures 10 1/2 x 8 1/4
http://photocollection.alonsorobisco.es/walking_italia.html
https://en.wikipedia.org/wiki/Giacomo_Brogi
Materials: paper, ink.