Nigeria has implemented several constitutions before and after the British colonial era. Military coups led to the enactment of some post-colonial constitutions. Below is a list of constitutions that have been in Nigeria: The colonial era (1914–1960) constitutions, The Clifford Constitution (1922), the Richards Constitution (1946), the Macpherson Constitution (1951), and the Lyttleton Constitution (1954). The 1960 constitution was enacted by the British Order-in-Council after Nigeria's independence. The 1963 constitution when Nnamdi Azikiwe become the first President of Nigeria. The 1979 constitution created the second republic of Nigeria. The 1993 constitution of the third republic of Nigeria. The 1999 constitution of the fourth republic of Nigeria is currently in use.