The Cahiers de Doléances were important because they were lists of grievances and demands compiled by the three estates of France (clergy, nobility, and commoners) in 1789. They highlighted the dissatisfaction of the French people with the monarchy and paved the way for the French Revolution by articulating the people's desire for political and social change.
Cahiers d'art ended in 1960.
Cahiers d'art was created in 1926.
Cahiers Élisabéthains was created in 1972.
Cahiers du cinéma was created in 1951.
Cahiers pour l'Analyse was created in 1966.
Cahiers Octave Mirbeau was created in 1994.
Yes, the phrase les cahiers ("the notebooks") is in the plural in French.
Most common usage would be des cahiers or les cahiers. Or, if a specific number is desired: deux cahiers, etc.
Cahiers québécois de démographie was created in 1971.
Cahiers Européens de l'Imaginaire was created in 1988.
Les Cahiers du Sud ended in 1966.
Les Cahiers du Sud was created in 1925.