1936 Berlin Germany Olympic Venues Postcards

My father brought these back when he returned from Germany after WWII. There are two more in the set and they're all unposted. Just B&W of the various venues. He noted on the back of one card that when he actually saw the structures when occupying Berlin in 1944, most were heavily damaged by artillery shells, bombs or bullets. Makes me think of Sarajevo 6 years after the 1984 Winter Olympics. The 4th card represents Herakles Entrance (son of Greek god Zeus, having superior strength).