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Keywords: ancient, antique, antiquity, archeology, archgway, architectural, architecture, austria, blue, carnuntum, central, city, civilization, construction, cultural, culture, danube, destination, destroyed, discovery, ecology, empire, entrance, europe, excavation, firmament, gantry, gate, goal, heidentor, heritage, historic, history, holiday, holidays, landmark, monumental, outdoor, passage, petronell, plain, roman, ruin, sky, stone, style, summer, summerly, tourism, town, travel, unesco, vacation, vacations, wall