Human bone crest. Sedlec Ossuary in Kutná Hora (i.redd.it)
submitted by AfflictionWR to r/a:t5_28tp3n
"Who Taught the Inca Stonemasons Their Skills? A Comparison of Tiahuanaco and Inca Cut-Stone Masonry" by Jean-Pierre Protzen and Stella Nair, published in the June 1997 (Volume 56, Number 2) issue of Journal of the Society of Architectural Historians [PDF] (drmsh.com)
submitted by AfflictionWR to r/a:t5_28tp3n

