the Finnish war effort by donating her Nobel Prize on 25 January 1940. Exile When Germany invaded Norway in April 1940, Undset was forced to flee. She had strongly criticised Hitler since the early 1930s, and, from an early date, her books were banned in Nazi Germany. She had no wish to become a target of the Gestapo and fled to neutral Sweden. Her eldest son, Second Lieutenant Anders Svarstad of the Norwegian Army, was killed in action at the age of 27, on 27 April 1940, in an engagement with German troops at Segalstad Bridge in Gausdal. Undset's sick daughter had died shortly before the outbreak of the war. Bjerkebæk was requisitioned by the Wehrmacht, and used as officers' quarters throughout the Occupation of Norway. In 1940, Undset and her younger son left neutral Sweden for the United States. There, she untiringly pleaded her occupied country's cause and that of Europe's Jews in writings, speeches and interviews. She lived in Brooklyn Heights, New York. She was active in St. Ansgar's Scandinavian Catholic League and wrote several articles for its bulletin. She also traveled to Florida, where she became close friends with novelist Marjorie Kinnan Rawlings. Following the German execution of the Danish Lutheran pastor Kaj Munk on 4 January 1944, the Danish resistance newspaper De frie Danske printed condemning articles from influential Scandinavians, including Undset. Return to Norway and death Undset returned to Norway after the liberation in 1945. She lived another four years but never published another word. Undset died at 67 in Lillehammer, Norway, where she had lived from 1919 through 1940. She was buried in the village of Mesnali, 15 kilometers east of Lillehammer, where also her daughter and the son who died in battle are remembered. The grave is recognizable by three black crosses. Honors Undset won the Nobel prize for literature in 1928, for which she was nominated by Helga Eng, member of the Norwegian Academy of Science and Letters. A mountain on the moon, east of crater Lambert at Mare Imbrium, was called Mons Undset, however, it was erroneously mentioned as Mons Undest on Lunar Topographic Orthophotomap 40B4. The International Astronomical Union (IAU) refused to include Mons Undset in the alphabetic gazetteer of officially named lunar formations. This mountain is nowadays known as Lambert γ (Lambert gamma). A crater on the planet Venus was named after Undset. Undset was depicted on a Norwegian