A groin vault<span> or groined </span>vault<span> (also sometimes known as a double barrel </span>vault<span> or cross </span>vault<span>) is produced by the intersection at right angles of two barrel </span>vaults. The word "groin<span>" refers to the edge between the intersecting </span>vaults<span>. Sometimes the arches of </span>groin vaults<span> are pointed instead of round</span>
A piece of music where one part echoes or imitates another part is known as a Canon
<span>D.
Its original name is the Fuller Building, but it reminds people of a flatiron.</span>
