Lycksalighetens ö (The Isle of Bliss) is a Swedish-language opera in four acts by Hilding Rosenberg; the libretto by the composer, is based on the 1823 play of the same name by Per Daniel Amadeus Atterbom.
Poetry which only touches the senses, cannot satisfy nobler souls yearning for eternal life and happiness (such as King Astolf).
Written during the Second World War, it was first performed at the Royal Swedish Opera, Stockholm, on 1 February 1945 and was revived several times in the following years.
In 2002 Norrlands Opera presented a production of a slightly abridged version of the score in Umeå conducted by Kristjan Järvi, of which recorded performances were issued by Musica Sveciae [sv].
In a cold forest, Astolf, king of the Hyperboreans loses his way while out hunting, and his courtiers accuse the bard Florio of leading him astray with tales of warmer lands.