Jeanne-Claude, who collaborated with her husband, Christo, on dozens of environmental art projects, notably the wrapping of the Pont Neuf in Paris and the Reichstag in Berlin and the installation of 7,503 vinyl gates with saffron-colored nylon panels in Central Park, died Wednesday in Manhattan, where she lived. She was 74.

A statement on the couple’s Web site, christojeanneclaude.net, said the cause was complications of a brain aneurysm.

Jeanne-Claude met her husband, Christo Javacheff, in Paris in 1958. At the time, Christo, a Bulgarian refugee, was already making art of wrapped packages, furniture and oil drums. Three years later, they made their first work together, a temporary installation on the docks in Cologne, Germany, that consisted of oil drums and rolls of industrial paper wrapped in tarpaulin.

Image Christo and Jeanne-Claude in 2004, announcing “The Gates.” Credit... Sara Krulwich/The New York Times

To avoid confusing dealers and the public, and to establish an artistic brand, they used only Christo’s name. In 1994 they retroactively applied the joint name “Christo and Jeanne-Claude” to all outdoor works and large-scale temporary indoor installations. Other works were credited to Christo alone.