Marian column
...that the Marian column on which Our Lady stands on Piazza Santa Maria Maggiore in Rome originally supported the vault of the Basilica of Constantine at the Roman Forum and was the only one such column to survive the Basilica's destruction in an earthquake?
...that the <b id="mwBic"><a href="./Marian_and_Holy_Trinity_columns" id="mwBig" rel="mw:WikiLink" title="Marian and Holy Trinity columns">Marian column</a></b> on which <a class="mw-redirect" href="./Blessed_Virgin_Mary" id="mwBik" rel="mw:WikiLink" title="Blessed Virgin Mary">Our Lady</a> stands on <a class="mw-redirect" href="./Piazza_Santa_Maria_Maggiore" id="mwBio" rel="mw:WikiLink" title="Piazza Santa Maria Maggiore">Piazza Santa Maria Maggiore</a> in <a href="./Rome" id="mwBis" rel="mw:WikiLink" title="Rome">Rome</a> originally supported the <a class="mw-disambig" href="./Vault" id="mwBiw" rel="mw:WikiLink" title="Vault">vault</a> of the Basilica of Constantine at the <a href="./Roman_Forum" id="mwBi0" rel="mw:WikiLink" title="Roman Forum">Roman Forum</a> and was the only one such column to survive the Basilica's destruction in an <a href="./Earthquake" id="mwBi4" rel="mw:WikiLink" title="Earthquake">earthquake</a>?