🖼️ ArtAges 16–18
The Pantheon, Rome
126
CatholicClassicalEuropean
The largest unreinforced concrete dome ever built, completed under Hadrian around 126 AD, with a nine-meter oculus open to the sky. Consecrated as a Christian church in 609. Every domed building in the Western tradition — Hagia Sophia, St. Peter's, the Capitol — traces back to this one.
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