letsgotgoing t1_it4fu5x wrote on October 20, 2022 at 9:21 PM Reply to comment by carrotwax in Was there mass migration of Roman citizens from Western Empire to Eastern Empire during degredation and after fall of Western part of empire. by [deleted] The romans used volcanic ash in their concrete. Huge difference in how long their structures survive even harsh conditions vs modern concrete. https://www.historicmysteries.com/roman-concrete/ Permalink Parent 8
letsgotgoing t1_it4fu5x wrote
Reply to comment by carrotwax in Was there mass migration of Roman citizens from Western Empire to Eastern Empire during degredation and after fall of Western part of empire. by [deleted]
The romans used volcanic ash in their concrete. Huge difference in how long their structures survive even harsh conditions vs modern concrete. https://www.historicmysteries.com/roman-concrete/