What "hemispherical vault" can mean?

Thanos N. Stasinopoulos @Thanos-Stasinopoulos

27 March 2023 0 8K Report

To my understanding, a "vault" is a horizontal semi-cylinder, created geometrically by sweeping a semi-circle or other open curve.

On the other hand, a "hemispherical" form is a half-sphere or "dome", not any sort of cylinder.

Given that, I wonder if the expression "hemispherical vault" makes any sense.

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