In 1866, Brazil-line ships benefited by the installations and facilities of the harbour for the first time. Building of a large military hospital. A sewerage system is installed as well as oil-lighting in the streets . Dakar - Bamako railway is put into service. The covered-market in Kermel square is completed.
Street lighting is electrified.
Establishment of the Medical College. Toulouse-Dakar realized on June 1st. Galandou Diouf replaces Blaise Diagne at the French National Assembly. Development of the number of inhabitants in Dakar.