Fortress of Frederick II of Swabia, Castel del Monte, Andria, Western Murge, Barletta, Apulia, Italy, Europe

archaeological site fortress frederick ii octagonal architecture apulia italy historic landmark medieval castle sunlight ancient walls western murge barletta architecture tourism history travel cultural heritage sky stone carving symmetry medieval design exploration scenic landmark castle interior natural light ancient structure building travel destination historical site visitors outdoor stone masonry landmarks octagonal shape fortification sun rays architectural heritage stone architecture ancient history tourism attraction historical architecture cultural site heritage travel tourist attraction