A covered passageway or underground corridor in ancient Roman buildings, used for storage, protection, or private movement through the structure.
Latin 'cryptoporticus' combines 'crypto-' (hidden/underground) and 'porticus' (portico/covered walkway), describing secret or hidden passageways that Romans built beneath or through their buildings.
Roman architects loved hidden passages—they built these underground corridors under cities and mansions so people could move around without being seen, kind of like secret tunnels in medieval castles but for ancient Rome!
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