同问

红色白正十字的纹样是马耳他骑士团罩袍上的标志。而丹麦和北欧其他国家国旗上的十字是偏向旗杆一侧的

凯尔特十字笑而不语

红底白色拉丁十字架是马耳他骑士团国的国旗。而八角形十字架是医院骑士团的标志。先有医院骑士团，后有骑士团国。

医院现在也是有领土的，还是联合国观察团员国。

引用一段维基百科对马耳他骑士团主权地位的论述：
the Sovereign Military Order of Malta, the third sovereign entity inside Italian territory (after San Marino and the Vatican City State) and the second inside the Italian capital (since in 1869 the Palazzo di Malta and the Villa Malta receive extraterritorial rights, in this way becoming the only "sovereign" territorial possessions of the modern Order), which is the last existing heir to one of several once militarily significant, crusader states of sovereign military orders. In 1607 its Grand masters were also made Reichsfürst (princes of the Holy Roman Empire) by the Holy Roman Emperor, granting them seats in the Reichstag, at the time the closest permanent equivalent to a UN-type general assembly; confirmed 1620). These sovereign rights were never deposed, only the territories were lost. 100 modern states still maintain full diplomatic relations with the order[24] (now de facto "the most prestigious service club"), and the UN awarded it observer status.

有一种说法是将马耳他骑士团在意大利的两座拥有治外法权的建筑视作“内飞地”