The ceiling of Paris opera is a magnificent work and a masterwork By Marc Chagall that was unveiled on this day in 1964. The nearly 2,600-square-foot canvas, which required a staggering 440 pounds of paint, was completed over the course of eight months in various Paris studios. The work of Marc Chagall quickly won over many early doubters and became a benchmark for integrating modernism into France’s historic landmarks. Chagall’s ceiling is now one of the Opera’s most popular attractions.