Hjalmar Welhaven
... that Norwegian architect Hjalmar Welhaven's collection of old skis was the basis for the world's oldest ski museum in 1923 when it opened in Oslo?
... that <a href="./Norway" id="mwEB4" rel="mw:WikiLink" title="Norway">Norwegian</a> architect <b id="mwEB8"><a href="./Hjalmar_Welhaven" id="mwECA" rel="mw:WikiLink" title="Hjalmar Welhaven">Hjalmar Welhaven</a></b><span about="#mwt48" class="nowrap" data-mw="{&quot;parts&quot;:[{&quot;template&quot;:{&quot;target&quot;:{&quot;wt&quot;:&quot;'&quot;,&quot;href&quot;:&quot;./Template:'&quot;},&quot;params&quot;:{},&quot;i&quot;:0}}]}" id="mwECE" style="padding-left:0.1em;" typeof="mw:Transclusion"><span typeof="mw:Entity">'</span></span>s collection of old <a href="./Ski" id="mwECI" rel="mw:WikiLink" title="Ski">skis</a> was the basis for the <a href="./Holmenkollen_Ski_Museum" id="mwECM" rel="mw:WikiLink" title="Holmenkollen Ski Museum">world's oldest ski museum</a> in 1923  when it opened in <a href="./Oslo" id="mwECQ" rel="mw:WikiLink" title="Oslo">Oslo</a>?