- 1967
- Konstantinos Kollias
- 1973
- Georgios Papadopoulos
- Capital
- Athens
- Common languages
- Greek
- Religion
- Greek Orthodoxy
- Demonyms
- Greek , Hellene
- Government
- Unitary constitutional monarchy under a military dictatorship (1967–1973) Unitary semi-presidential republic under a military dictatorship (1 June to 25 November 1973) Unitary quasi- parliamentary republic under a military dictatorship (25 November 1973 to 24 July 1974)
- King 1967 1973
- Constantine II
- Regent 1967 1972 1972 1973
- Georgios Zoitakis , Georgios Papadopoulos
- 1973 1974
- Phaedon Gizikis
- 1967 1973
- Georgios Papadopoulos
- Legislature
- Hellenic Parliament ( nominal, suspended; de-facto ruled by decree )
- Historical era
- Cold War
- Coup d tat of 21 april
- 21 April 1967
- Constantine ii s counter coup attempt an
- 13 December 1967
- Constitutional referendum
- 15 November 1968
- Republic declared
- 1 June 1973
- Republic referendum
- 29 July 1973