Like a survey of Western art, among the most important collections are classical works by Fra Angelico, Van Eyck, Derer, Rembrandt, Hals, Titian, Van Dyck, and Rubens, and Impressionist works by Manet, Monet, Renoir, Gaugain, Toulouse-Lautrec, C??zanne, and Van Gogh, among many others.

Does it follow that "Some other paintings have been sold out of the collection over the years."?
it is not possible to tell