U.S. Department of Agriculture South Building
... that the U.S. Department of Agriculture South Building was the largest office building in the world until the construction of the Pentagon?
... that the <b id="mwCuw"><a class="mw-redirect" href="./U.S._Department_of_Agriculture_South_Building" id="mwCu0" rel="mw:WikiLink" title="U.S. Department of Agriculture South Building">U.S. Department of Agriculture South Building</a></b> <i id="mwCu4">(pictured)</i> was the largest office building in the world until the construction of the <a href="./The_Pentagon" id="mwCu8" rel="mw:WikiLink" title="The Pentagon">Pentagon</a>?