ciborium
... that for much of the Middle Ages, church altars were hidden from view at points in services by curtains hung from a ciborium ?
... that for much of the <a href="./Middle_Ages" id="mw8g" rel="mw:WikiLink" title="Middle Ages">Middle Ages</a>, church <a class="mw-redirect" href="./Altar_(Catholicism)" id="mw8w" rel="mw:WikiLink" title="Altar (Catholicism)">altars</a> were hidden from view at points in services by curtains hung from a <b id="mw9A"><a href="./Ciborium_(architecture)" id="mw9Q" rel="mw:WikiLink" title="Ciborium (architecture)">ciborium</a></b> <i id="mw9g">(example pictured)</i>?