Linked from
The 100 pages that link to Papal States, each with the reason it gives.
Emilia-RomagnaRelated: Papal rule strongly influenced Romagna and other eastern territories.
Treaty of AnagniRelated: Papal diplomacy and authority were central to the agreement’s terms.
Pope Leo XIINarrower topic: Leo XII became both pope and ruler of this territory.
Pope Pius VIIIRelated: Pius VIII ruled these territories as well as leading the Church.