https://www.bbradio.de/p/kniesche-tag-der-offenen-tuer-am-13.-juni-2026-in-potsdam-babelsberg-5FIkOgPrZeYN3ulhtMdRTg 2026-05-26T11:28:54Z https://cdn.radiosphere.io/images/69f7f6d8-e5cf-48b5-9dc5-437fba5af3a6?type=medium BB RADIO de 2026-05-26T11:25:38Z Kniesche Tag der offenen Tür am 13. Juni 2026 in Potsdam Babelsberg Veranstaltungen