Three decades after their political independence, Black-African republics still search for stability. One-party states and military regimes have failed, but while both systems seem to retreat, presidentialism, the third branch of Negro-African governmentality, is likely to become a permanent phenomenon within post-colonial Central-African politics. Constitutionally rooted in presidential institutions, the single executive disposes of many instruments to establish presidentialist practices. Presidentialism itself refers to such historical precedents as the rule of traditional kings, colonial governors and nationalist leaders. Its legitimacy leans on the need for comprehensible government, political stability, economic development and effective direction. Different kinds of presidentialism exist, but their classification depends on numerous criteria which are aften incompatible, and many characteristics of presidentialism can be indicated, of which the most important are patriarchy, wealth, charisma, sacralisation and historicity. Although presidentialism appears as an important aspect of the contemporary African political systems, few research has been done to explain the emergence and persistence of this phenomenon.