我剛遊法國,在老佛爺百貨公司被偷了新買的名店手袋. 百貨公司沒有做好保安, 又沒有貼出告示提醒客人, 請問我可以要百貨公司賠償損失嗎?

It is possible, but difficult.

At the minimum, the incident happened in France. You will have to negotiate everything in its favour (language, law, etc.)

發生地在法國你要不要告法國政府未管治安,讓你受到損失