The <a href="https://en.wikipedia.org/wiki/Cornerstone" id="mwKQ" rel="mw:WikiLink" title="Cornerstone">cornerstone</a> of the current <a href="https://en.wikipedia.org/wiki/St._Peter's_Basilica" id="mwKg" rel="mw:WikiLink" title="St. Peter's Basilica">St. Peter's Basilica</a> is laid.