Opus reticulatum

Rarity: Common

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At a glance

Class

Invention

Domain

Science and technology

Knowledge cost

1

In collections

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What Wikipedia says

Opus reticulatum (also known as reticulate work) is a facing used for concrete walls in Roman architecture from about the first century BCE to the early first century CE. They were built using small pyramid-shaped tuff, a volcanic stone embedded into a concrete core.

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

Image: Jensens, Public domain, via Wikimedia Commons.