Isabelle de Charrière, known as Belle van Zuylen in the Netherlands, née Isabella Agneta Elisabeth van Tuyll van Serooskerken, and [Madame] Isabelle de Charrière elsewhere, was a Dutch and Swiss writer of the Enlightenment who lived the latter half of her life in Colombier, Neuchâtel. She is now best known for her letters and novels, although she also wrote pamphlets, music and plays. She took a keen interest in the society and politics of her age, and her work around the time of the French Revolution is regarded as being of particular interest.