President of Nigeria became the newly elected civilian president. Obasanjo served two terms in office. In May 2007, Alhaji Umaru Yar'Adua was sworn in as President of the Federal Republic of Nigeria, the 13th head of state of Nigeria. Yar'Adua died on 5 May 2010 in the Presidential villa, in Abuja, Nigeria. On 6 May 2010, the Vice President Goodluck Jonathan was sworn in as President of the Federal Republic of Nigeria and the 14th head of state. On 29 May 2015, Muhammadu Buhari was sworn in as President of the Federal Republic of Nigeria and the 15th head of state after winning
Constitution of Nigeria British order in council so as to come into force immediately upon independence, on 1 October 1960. Under this constitution Nigeria retained Queen Elizabeth II as titular head of state. Independent Nigeria's second constitution established the country as a federal republic. It came into force on 1 October 1963 (Nigeria's third anniversary as an independent nation). The 1963 constitution, which was based on the Westminster system, continued in operation until a military coup in 1966 overthrew Nigeria's democratic institutions. The 1979 constitution, which brought in the Second Republic, abandoned the Westminster system in favour of an American-style presidential system, with