-Greek City-States merge to form Greece

Republic of Greece
	Presidency
		-Prince Alexander Mavrokordatos (1822-1828)
		-Count Ioannis Kapodistrias (1828-1831)
	Regency
		-Count Augustin Kapodistrias (1831-1832)

Kingdom of Greece
	Wittelsbach House
		-Otto (1833-1862)
	Oldenburg House
		-George I (1863-1913)
		-Constantine I (1913-1917)
		-Alexander (1917-1920)
		-Constantine I (Restored: 1920-1922)
		-George II (1922-1924)

Republic of Greece
	Presidency
		-Pavlos Konduriotis (1924-1926)
		-Gen. Theodoros Pangalos (1926)
		-Pavlos Konduriotis (1926-1929)
		-Alexander Zaimis (1929-1935)

Kingdom of Greece
	Oldenburg House
		-George II (Restored: 1935-1947)
		-Paul (1947-1964)
		-Constantine II (1964-1973)

Republic of Greece
	Presidency
		-George Papapoulos (1973)
		-Phaidon Gizikis (1973-1974)
		-Michael Stasinopoulos (1974-1975)
		-Constantine Tsatsos (1975-1980)
		-Constantine Karamanlis (1980-1985)
		-Christos Sartzetakis (1985-1990)
		-Constantine Karamanlis (Reelected: 1990-1995)
		-Constantine Stephanopoulos (1995-        )