URL:https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Jean-Léon_Gérôme_-_The_Christian_Martyrs'_Last_Prayer_-_Walters_37113.jpg/330px-Jean-Léon_Gérôme_-_The_Christian_Martyrs'_Last_Prayer_-_Walters_37113.jpg
掲載元:https://ja.wikipedia.org/wiki/コロッセオ