Definitions for "Triumphal arch"
In ancient Rome, a freestanding monumental arch or series of three arches erected to commemorate a military victory; usually decorated with sculptured scenes of a war and its subsequent triumphal procession. In a Christian church, the transverse wall with a large arched opening that separates the chancel and the apse from the main body of the church, and that is frequently decorated with religious scenes executed in mosaic or fresco.
a monumental archway; usually they are built to commemorate some notable victory
a building in the shape of a monumental gate , usually built to celebrate a victory in war