Ictineo II
... that the original viewports of the pioneering submarine Ictineo II ended up as bathroom windows?
... that the original viewports of the pioneering <a href="./Submarine" id="mwGDY" rel="mw:WikiLink" title="Submarine">submarine</a> <i id="mwGDc"><b id="mwGDg"><a class="mw-redirect" href="./Ictineo_II" id="mwGDk" rel="mw:WikiLink" title="Ictineo II">Ictineo II</a></b> (replica pictured)</i> ended up as bathroom windows?