laststandonzombieisland

Official caption, November 1944, Holland: “The Germans installed this gun in the bandstand at Nieuland [Nieuwland], near Middelburg, to cover the crossroads in the town.”

The gun appears to be an 8.8 cm Pak 43/41 anti-tank gun, the famed “German 88,” likely of the newly formed Artillerie-Regiment 170 (Oberst Franz A.M. Lex). Nieuwland was liberated by the 52 (L) Reconnaissance Regiment, of the 52nd (Lowland) Infantry Division, as part of Anglo-Canadian joint Operation Infatuate, the amphibious landing that gave Allies shipping access to Antwerp docks. 

Since you came this far, below is a period USAAF training film on the 88, at least in its AAA role.