de Selys Longchamps DFC (31 May 1912 – 16 August 1943) was a Belgian aristocrat and RAF fighter pilot during World War II.

[3] At the outbreak of the war, Selys Longchamps was drafted into the Belgian Army, in which he was commissioned as a cavalry officer with the 1er Régiment des Guides.

[4] Immediately upon the fall of Belgium on May 10, 1940, the Gestapo commandeered Résidence Belvédère, a luxurious Art Deco apartment building located at 453 Avenue Louise[a] in Brussels as its headquarters, and tortured prisoners in its cellars.

[3] Longchamps devised a plan to strafe the building in order to raise the morale of occupied Belgians, which RAF command repeatedly declined.

[1] Longchamps first flew his Typhoon down the Avenue Louise to make a high-speed pass of the target building, reportedly to have the roar of the Napier Sabre engine draw Gestapo personnel to the unprotected windows.

He continued through the left turn of the connecting Avenue Emile De Mot to an unobstructed and fairly frontal firing position with little risk of collateral damage and raked the target with his four 20 mm Hispano autocannons, resulting in the death of SS-Obersturmführer Werner Vogt of the SiPo, SS-Sturmbannführer Alfred Thomas, head of Abteiling III of the Sicherheitsdienst (SD) in Belgium, a high-ranking Gestapo officer named Müller, and others.