Opus incertum

Rarity: Common

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At a glance

Class

Invention

Domain

Science and technology

Knowledge cost

1

In collections

Nobody has pulled it yet.

What Wikipedia says

Opus incertum ("irregular work") was an ancient Roman construction technique, using irregularly shaped and randomly placed uncut stones or fist-sized tuff blocks inserted in a core of opus caementicium.

Excerpt from the Wikipedia article “Opus incertum”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: antonioa89, CC BY-SA 3.0, via Wikimedia Commons.