Ertholmene

Ertholmene is a small archipelago in Denmark. The largest island is Christiansø, and its name often refers to the entire archipelago. Ertholmene is situated 18 kilometres northeast of Gudhjem, Bornholm, and contains Denmark's easternmost point. Two of its islands, Christiansø and Frederiksø, are inhabited, and their combined permanent population is 89. The archipelago has a total area of 39 hectares. Its name is derived from the Danish for "pea islands".

Together with Bornholm it is part of Landsdel Bornholm. Ertholmene makes up the Parish of Christiansø in the Church of Denmark and is served by Christiansø Church. On 1 January 2017 out of 78 inhabitants in total there were 69 members of the Church of Denmark. Ertholmene has never been part of a municipality, county, or region. The islands are administered by the Ministry of Defence.