The National Museum of Iceland was established on 24 February 1863, with Jón Árnason the first curator of the Icelandic collection, previously kept in Danish museums. The second curator, Sigurður Guðmundsson, advocated the creation of an antiquarian collection, and the museum was called the Antiquarian Collection until 1911.
Before settling at its present location, at Suðurgata 41, 101 Reykjavík, in 1950, it was housed in various Reykjavík attics, finally for forty years in the attic of the National Library building on Hverfisgata.
Wikipedia https://en.wikipedia.org/wiki/National_Museum_of_Iceland
Official Website http://www.natmus.is/
Coordinates 64°8'31.022" N -21°56'53.385" E