The Devonshire Dome
... that the renovation of the The Devonshire Dome in 1881 by Robert Rippon Duke created the world's largest unsupported dome, with a diameter of 44.2 metres (145 ft), and is still the largest in the UK today?
... that the renovation of the <b id="mwFi8"><a class="mw-redirect" href="./The_Devonshire_Dome" id="mwFjA" rel="mw:WikiLink" title="The Devonshire Dome">The Devonshire Dome</a></b> in 1881 by <a href="./Robert_Rippon_Duke" id="mwFjE" rel="mw:WikiLink" title="Robert Rippon Duke">Robert Rippon Duke</a> created the world's largest unsupported dome, with a diameter of <span about="#mwt60" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"44.2"},"2":{"wt":"m"},"3":{"wt":"ft"}},"i":0}}]}' id="mwFjI" typeof="mw:Transclusion">44.2 metres (145</span><span about="#mwt60" typeof="mw:Entity"> </span><span about="#mwt60">ft)</span>, and is still the largest in the UK today?