Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Ħal Saflieni Hypogeum' has mentioned 'Trilithon' in the following places:
Occurrence Sentence Text Source
A number of trilithon entrances are represented, some blind, and others leading to another chamber.
[6] The focal point is a porthole within a trilithon, or structure consisting of two large vertical stones, which is in turn framed within a larger trilithon and yet another large trilithon.
Features include false bays, inspired by trilithon doorways, and windows.