royal palace 88ROYAL PALACE. 20 Rue de Hochfelden, 67330 KIRRWILLER - FRANCE +33 (0)3 88 70 71 81. Conditions générales d'utilisation; Foire aux questions; Presse;Tours of the Royal Palace . The Royal Palace in Oslo is usually open to the public every year from late June until the middle of August. The guided tour takes visitors through some of the most important and lovely rooms in the Palace.