Nikki is the preeminent royal center of the Baatonu, often called Bariba, in the Borgou region of northern Benin. The kingdom's origins are preserved primarily through oral histories that connect local communities with immigrant Wasangari warrior lineages. Accounts differ over dates and individual founders, so the palace's conventional fifteenth-century chronology should be treated as a broad tradition rather than a precise construction date. The royal compound developed as the residence of the Sinaboko, or king of Nikki, and as the ceremonial focus of a network of related chiefdoms.

Authority at Nikki was distributed among royal dynasties, titleholders, ministers, earth priests, cavalry elites, and subordinate communities. The palace provided spaces for audiences, tribute, dispute resolution, ritual, storage, and the ruler's household. Earthen walls and thatched buildings were renewed according to local building practice, meaning institutional continuity does not depend on every wall being ancient. The court stood at the intersection of farming, regional trade, horse culture, warfare, and religious traditions that included both older Baatonu practices and growing Islamic influence.

During the nineteenth century, Nikki and neighboring Borgu states faced rivalry, internal succession disputes, and pressure from expanding powers. King Séro Kpéra II died while campaigning near Ilorin around 1830, an event remembered as a turning point in royal power. European competition intensified late in the century as France and Britain sought treaties and territorial control. French colonial rule placed Nikki within Dahomey while preserving a recognized king and chiefs as intermediaries. The palace's political reach narrowed, but its authority in identity, ceremony, and local mediation endured.

After the Republic of Dahomey, later Benin, became independent in 1960, the court continued beside elected and appointed government. Kings of Nikki no longer ruled a sovereign state, yet succession remained important to communities across Borgou and beyond national borders. The palace received chiefs, delegations, and petitioners, and royal ceremonies reinforced relationships among lineages. Periodic rebuilding preserved an active compound rather than an archaeological ruin. Modern state heritage initiatives have increasingly recognized this living system of authority as part of Benin's national cultural inheritance.

The annual Gaani festival is the palace's most visible public event. Provincial rulers and communities gather at Nikki, renew allegiance, exchange gifts, celebrate horsemanship, and affirm kinship among dynasties. Its ceremonies carry layers of royal, religious, and popular meaning that cannot be reduced to spectacle. The palace remains an operating court, so access and conservation differ from those of a conventional museum. Nikki's significance lies in the survival of an institution through oral transmission, ceremonial renewal, colonial reorganization, and republican government, with architecture continually maintained to serve a living political culture.