Ключевые слова: alzette, blue sky, city of luxembourg, cityscape, clouds, cultural heritage, eu, europe, grund, historic sites, historical monuments, houses, landscape, luxembourg, medieval architecture, medieval buildings, middle ages, old city, old town, old town of luxembourg, river, sightseeing, sky, spire, street, summer, symbol, tourism, tourist, travel, travel photography, unesco world heritage site, valley, world cultural heritage, world heritage,