U.S. Capitol Gatehouses and Gateposts
... that the poor grade sandstone used in the original U.S. Capitol Gatehouses and Gateposts required them to undergo a complete restoration in 1938?
... that the poor grade <a href="./Sandstone" id="mwC58" rel="mw:WikiLink" title="Sandstone">sandstone</a> used in the original <b id="mwC6A"><a href="./U.S._Capitol_Gatehouses_and_Gateposts" id="mwC6E" rel="mw:WikiLink" title="U.S. Capitol Gatehouses and Gateposts">U.S. Capitol Gatehouses and Gateposts</a></b> required them to undergo a complete <a class="mw-redirect" href="./Building_restoration" id="mwC6I" rel="mw:WikiLink" title="Building restoration">restoration</a> in 1938?