Zeinodin Caravanserai
... that the recent renovation of the Zeinodin Caravanserai in Iran took three years and included the use of 13,000 pumice stones to remove the grime on the interior walls?
... that the recent renovation of the <b id="mwCNw"><a class="mw-redirect" href="./Zeinodin_Caravanserai" id="mwCN0" rel="mw:WikiLink" title="Zeinodin Caravanserai">Zeinodin Caravanserai</a></b> <i id="mwCN4">(pictured)</i> in Iran took three years and included the use of 13,000 <a class="mw-redirect" href="./Pumice_stone" id="mwCN8" rel="mw:WikiLink" title="Pumice stone">pumice stones</a> to remove the grime on the interior walls?