Chateau de Pignerolle: Headquarters of the Battle of the Atlantic

The Chateau de Pignerolle stands as a remarkable example of neoclassical architecture nestled in the commune of Saint-Barthélemy-d’Anjou, France. Constructed in 1776 for the director of the equestrian academy in Angers, Marcel Avril de Pignerolle, it is 25m by 17m and lies in a park of 80 hectares. Its evolution reflects a rich tapestry of historical events, from aristocratic leisure pursuits to pivotal roles in 20th-century military history.

In the 20th century, the chateau was requisitioned by the Polish government-in-exile from 1939 to 1940. Władysław Raczkiewicz, the Polish President in Exile, stayed there from 2 December 1939. During this time, Polish cryptologists, including Marian Rejewski, were evacuated to France to work with French and British code breakers on Enigma-enciphered messages while the Polish Government in Exile were located in nearby Angers.

However, in June 1940, the chateau was captured and requisitioned by the German Wehrmacht. From 1942 to 1944, it served as a command center for U-boats, chosen for its safety, good radio communication, and flat land. Construction of a command bunker began in April 1942 and was completed in May 1943. The main command bunker housed teletype communications and aerial masts to transmit and receive enigma coded messages with submarines in the Atlantic. After World War II, the barracks were used firstly by US troops then as a repatriation center until in January 1946 it housed 1,000 displaced people.

In 1961, the barracks were listed as a national monument. The bunker was taken over by the French government as a reserve nuclear fallout center for President Charles de Gaulle during the Cold War era, and was later acquired by Angers in 1971 for restoration over the next 20 years. From 1992 until 2015, the Chateau was a museum dedicated to European communications. The gardens remain open to the public and occasional events are held in the park.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons