what was concrete made out of in ancient rome
Roman concrete Roman concrete, like any concrete, consists of an aggregate and hydraulic mortar â€“ a binder mixed with water that hardens over time. The aggregate varied, and included pieces of rock, ceramic tile, and brick rubble from the remains of previously demolished buildings.
Pantheon, Rome The Pantheon (/ˈpænθiən/ or US: /ˈpænθiɒn/;[1] Latin: Pantheum,[nb 1] from Greek Πάνθειον Pantheion, "[temple] of all the gods") is a former Roman temple, now a church, in Rome, Italy, on the site of an earlier temple commissioned by Marcus Agrippa during the reign of Augustus (27 BC – 14 AD). The present building was completed by the emperor Hadrian and probably dedicated about 126 AD. He retained Agrippa's original inscription, which has caused confusion over its date of construction as the original Pantheon burned down, so it is not certain when the present one was built.[2]