monolith

noun

• 1a large single upright block of stone, especially one shaped into or serving as a pillar or monument.
• a very large and characterless building:the 72-story monolith overlooking the waterfront
• a large block of concrete sunk in water, e.g., in the building of a dock.

• 2a large and impersonal political, corporate, or social structure regarded as intractably indivisible and uniform:the dominance of broadcasting monoliths limits local programming