basilica saints nazarius and celsus in the ancient fortress city carcassonne in occitania, france

ancient arch architecture basilica beautiful building carcassonne castle cathedral celsus centre christianity church citadel city construction culture destination downtown edifice fortification fortress framed france french heritage historic history landmark languedoc medieval nazarius occitania old picturesque religion roman saint sightseeing spectacular steeple stone stronghold tour tourism town travel unesco vacations visit