Answer
Gustave Caillebotte's extensive collection of artworks, including masterpieces by Renoir, Monet, Manet, Degas, and Pissarro, was inherited by his brother, Martial Caillebotte, after his death in 1894. Martial displayed great care in preserving his brother's collection and eventually donated the majority of these artworks to the French state, ensuring their accessibility and continued appreciation by the public.