Inside Arena pula. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3339263/free-photo-image-amphitheater-amphitheatre-archaeologyFree Image from public domain licenseRestanten van het amfitheater van Pula (1851 - 1920) by anonymous https://www.rawpixel.com/image/13760592/restanten-van-het-amfitheater-van-pula-1851-1920-anonymousFree Image from public domain license