Public buildings Free Time Center Parkoers in The Hague (NL) Principal : Foundation Free Time and Education, South-Holland North Architect : Vera Yanovshtchinsky architects, The Hague Engineer : Pieters Bouwtechniek, Delft Engineer timber structure : Lüning structural engineers, Doetinchem Link : Houtblad / Houtwereld Douglas round timber tree-trunks.