Photos from De Angelis D'Ossat's Visit (1930's)

The following photos come from De Angelis D'Ossat's 1943 La Geologia Delle Catacombe Romane (Roma Sotterranea Cristiana, vol. III). Note the markers on the first two photos that correspond to the geological layers:

• 14: Loose sandy loam and fluvial accumulations.
  
• 13: Reddish semi-lithoid tufa.
  
• 12: Vulcanic detritus
  
• 11: Homogenous lithoid tufa, subtly striated.
  
• 10: Lithic tufa, used for construction

"Photograph of the Last Remnant of the Jewish Cemetery"
Subcaption: The gaping hole reveals the remains of a series of niches in significant decay. The two black lines mark the thickness of layer 12 (approx. 1.2 m).

"Photograph of the Last Remants of Jewish Cemetery"
Subcaption: To the right, one can see the remants of a series of decaying niches.

A Schematic Plan of the Geological Strata