tetrapylon

[ te-truh-pahy-lon ]
/ ˌtɛ trəˈpaɪ lɒn /

noun, plural tet·ra·py·la [te-truh-pahy-luh] /ˌtɛ trəˈpaɪ lə/.

a structure having four gateways as features of an architectural composition.

Origin of tetrapylon

1900–05; < Greek, tetrápylon, noun use of neuter of tetrápylos having four gates. See tetra-, pylon