From Wikipedia: http://en.wikipedia.org/wiki/Tippu_Tip%27s_House

Tippu Tip's House is a historical building in Stone Town, Zanzibar, located in Suicide Alley in the Shangani ward[2] near the Africa House Hotel and Serena Inn, about 15–25 minute walking time from the Old Fort and Forodhani Gardens. It is the house where the powerful merchant and slave trader Tippu Tip (1837-1905) lived.