Neo Holy Roman Empire

The Neo Holy Roman Empire is a union of European states that are aligned with Holy See in Rome. Consisting of the Iberian Union, Kingdom of France, Kingdom of Great Britain & Avalon, Kingdom of Ireland, Kingdom of Germany, Swiss Confederacy and Kingdom of Italy, which hosted the seat of its power, Rome. The Neo Holy Roman Empire was tacitly allied with the Russian Empire and Neo Byzantine Empire, as well as having an on again off again rivalry with the Neo Ottoman Empire. 
Despite the name, the Neo Holy Roman Empire was less of an empire and more so like the European Union of the 20th and 21st centuries. It was governed by a council of representatives elected from each member state and had three executives: two Holy Roman Emperors (elected from one of the rulers of a member state or a representative) and the Pope. 
Although united, there has been some internal conflicts and rivalries between the different nations and the union has threatened to fall apart at several times throughout its history.