The event 's usual venue was closed during this period .
It was staged temporarily at Le Tremblay ( 1942 -- 43 ) and Longchamp ( 1944 -- 45 ) .
The event 's usual venue was closed during this period , so it was staged temporarily at Le Tremblay ( 1942 -- 43 ) and Longchamp ( 1944 -- 45 ) .