Monolith

Mono-lith

Noun

A single great stone often in the form of a column or obelisk

A massive structure

An organized whole that acts as a single unified powerful or influential force

One of the opening scenes in 2001 depicts primitive humanoids worshipping a large, rectangular monolith.

Monolith was first used in English in 1836, but it traces its lineage back to the Greek word monolithos.