Latin, from Greek propylaion, from pro- before + pylē gate — more at pro-
1637, in the meaning defined above
“Propylaeum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/propylaeum. Accessed 1 Dec. 2023.
Britannica.com: Encyclopedia article about propylaeum
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