<Tr> <Th> </Th> <Td> </Td> <Td> Nnamdi Azikiwe (1904--1996) </Td> <Td> 16 November 1960 </Td> <Td> 1 October 1963 </Td> <Td> 2 years, 319 days </Td> <Td> Elizabeth II </Td> <Td> Balewa </Td> </Tr> <P> Under the 1963 Constitution, the first constitution of the Republic of Nigeria, the President replaced the monarch as ceremonial head of state . The President was elected by Parliament for a five - year term . In the event of a vacancy the President of the Senate would have served as Acting President . </P> <Table> <Tr> <Th_colspan="3"> President </Th> <Th_colspan="3"> Term of office </Th> <Th> Political party (at time of election) </Th> <Th> Prime Minister (s) </Th> </Tr> <Tr> <Th> No </Th> <Th> Portrait </Th> <Th> Name </Th> <Th> Took office </Th> <Th> Left office </Th> <Th> Duration </Th> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> Nnamdi Azikiwe (1904--1996) </Td> <Td> 1 October 1963 </Td> <Td> 16 January 1966 (deposed .) </Td> <Td> 2 years, 107 days </Td> <Td> National Council of Nigeria and the Cameroons </Td> <Td> Balewa </Td> </Tr> </Table> <Tr> <Th_colspan="3"> President </Th> <Th_colspan="3"> Term of office </Th> <Th> Political party (at time of election) </Th> <Th> Prime Minister (s) </Th> </Tr>

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