the ancient certosa di pisa in calci, italy, under a beautiful sky

sky mountain hill landscape ruins castle village building cloud estate town monastery landmark tourism fortification ancient certosa pisa calci italy europe under beautiful ancient arch architecture blue building calci cathedral certosa chapel charter house charterhouse christianity church cloud clouds complex convent culture dome europe facade famous green hill italian italy landmark landscape medieval monumental mountain mountains nature old panorama panoramic pisa scenic sky statue stone summer tourism town tuscany val graziosa valgraziosa valley view