Final answer:
Fort Lamy was the previous name of the city currently known as N'Djamena, the capital of Chad, before it was renamed in 1973. It does not refer to an architectural design or a (3) specific historical event in the 1960s.
Step-by-step explanation:
Fort Lamy was the name of a city in Chad before it was renamed to N'Djamena in 1973. Named after a French officer, Émile Gentil, Fort Lamy served as the capital of the French colonial territory in the region. The city played a significant role during the French colonial period and also in the early years of Chad's independence.
It does not refer to a specific building designed by Candilis-Josic-Woods, nor does it directly imply a historical event in the 1960s, although the 1960s were certainly a period of transition for Chad as it achieved independence from France in 1960.