groin vault
... that the load bearing efficiency of the Roman-developed groin vault has been validated by 20th century structural engineering modeling?
... that the <a class="mw-redirect" href="./Load_bearing_wall" id="mwA88" rel="mw:WikiLink" title="Load bearing wall">load bearing</a> efficiency of the <a class="mw-redirect" href="./Roman_architecture" id="mwA9A" rel="mw:WikiLink" title="Roman architecture">Roman</a>-developed <b id="mwA9E"><a href="./Groin_vault" id="mwA9I" rel="mw:WikiLink" title="Groin vault">groin vault</a></b> <i id="mwA9M">(pictured)</i> has been validated by 20th century <a href="./Structural_engineering" id="mwA9Q" rel="mw:WikiLink" title="Structural engineering">structural engineering</a> <a href="./Mathematical_model" id="mwA9U" rel="mw:WikiLink" title="Mathematical model">modeling</a>?