The round arch and barrel valult are similar in shape.
The barrel vault is an extension of the round arches which form
the vault or roof of a structure.
View page
A barrel vault is a structure that spans an open area. It is a
ceiling that is like half of a cylinder. Take a soup can and cut it
in half from the top to bottom, and then look inside. The shape is
that of a barrel vault.
View page
A vault formed by the intersection at right angles of two barrel vaults.