The designer Louis Masreliez– who became a trendsetter in the interior design of the period– was commissioned for the interiors. The pavilion was just one of many great plans and visions that Gustav III had for the Haga Park, many of which made it no further than the drawing board. Gustav III made use of the pavilion for a few years before his assassination. It was from the pavilion that Gustav III left for the fateful masquerade ball at the Opera on 16 March 1792. After the assassination of Gustav III, Duke Charles used the pavilion as his temporary residence.