Roman brick
...that both ancient and modern examples of Roman brick have similar proportions?
...that both <a href="./Ancient_history" id="mwERM" rel="mw:WikiLink" title="Ancient history">ancient</a> and modern examples of <b id="mwERQ"><a href="./Roman_brick" id="mwERU" rel="mw:WikiLink" title="Roman brick">Roman brick</a></b> have similar proportions?