41 selected
- Not filled in
- Ragusa - Republic (1358-1808)
- Ragusa - Republic Ragusa (1358-1808)
- Ras al Khaimah - Emirate (1969-1970)
- Republic of China - Republic (1949-present)
- Réunion - French Colony (1848-1946)
- Réunion - French Overseas Department (1946-present)
- Réunion - Île Bourbon (1664-1848)
- Reval - Swedish occupation (1648-1651)
- Rhodesia - British Protectorate (1965-1979)
- Rhodesia and Nyasaland - Federation (1953-1964)
- Rhodesië (south) - self rulr (1964-1965)
- Riga - Free City (1561-1581)
- Roman Empire - Antoninus Pius to Commodus (138-192)
- Roman Empire - Augustus to Vitellius (31 B.C.-69)
- Roman Empire - Aurelianus (270-275)
- Roman Empire - Constantine and Licinius (313-337)
- Roman Empire - Family of Constantine the Great (337-364)
- Roman Empire - Gordian III to Uranius Antoninus (238-253)
- Roman Empire - Macrinus to Pupienus (217-238)
- Roman Empire - Nerva to Hadrian (96-138)
- Roman Empire - Pertinax to Geta (192-217)
- Roman Empire - Probus to Amandus (276-293)
- Roman Empire - The Divided Empire to the Decline of the Western Roman Empire (395-491)
- Roman Empire - The Tetrarchy from the Monetary Reformation of Diocletian (294-313)
- Roman Empire - Troas as Roman Colony in the Provence Asia (20 B.C.-284 A.D.)
- Roman Empire - Valentinian I to Theodosius I (364-395)
- Roman Empire - Valerian to Florianus (253-276)
- Roman Empire - Vespasian to Domitian (69-96)
- Roman Republic (509-27 BC)
- Romania - Kingdom (1862-1881)
- Romania - Kingdom (1881-1947)
- Romania - People's Republic (1948-1963)
- Romania - Republic (1990-present)
- Romania - Socialistic Republic (1966-1983)
- Ruanda-Urundi - Franc (1887-1967)
- Rusland - Moskovische periode (1450-1700)
- Russia - Empire (1700-1917)
- Russia - Russian Federation (1991-heden)
- Russia - Sovjet Union (1917-1991)
- Rwanda - Republic (1962-heden)
- Rwanda and Burundi - Provinces (1960-1964)