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In classical orders, what is an abacus? | QuestionStock

Representative image for question: In classical orders, what is an abacus?

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Architecture

In classical orders, what is an abacus?

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In classical orders, what is an abacus?

Options:

A flat square slab at the top of a capital that supports the architrave
The rounded molding at a column base
A small decorative column between arches
The vertical groove carved on a shaft

Correct answer: A flat square slab at the top of a capital that supports the architrave

Explanation: An abacus is the flat square slab that caps a column capital and bears the architrave; it appears in Doric and Ionic orders, as on the Parthenon completed c.432 BCE.

Created 2026-03-10T17:19:13.764Z. Updated 2026-03-10T17:19:13.764Z.