ancient architecture Bonaguil castle defend dordogne France french high historical old power protection Remains secure security stone strength strong tower wall arch gatehouse arches battlements building city david defence fort fortifications interior Israel Jerusalem ruins walls ascension church convent landmark limestone Mount of Olives orthodox russian spire steps decorative pillar window blocks fortress Golan Heights Mivtzar Nimrod Nimrod Nimrud Qal'at Namrud stronghold bull Caesarea Maritima design elements figure floor fruit grapes Herod mosaic ox pattern bird goose duck