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Marguerite "Peggy" Guggenheim (August 26, 1898 - December 23, 1979) was an American art collector, bohemian and socialite. Born to the wealthy New York City Guggenheim family, she was the daughter of Benjamin Guggenheim, who went down with the Titanic in 1912, and the niece of Solomon R. Guggenheim, who would establish the Solomon R. Guggenheim Foundation. Peggy Guggenheim created a noted art collection in Europe and America primarily between 1938 and 1946. She exhibited this collection as she built it and in 1949, settled in Venice, where she lived and exhibited her collection for the rest of her life.
In January 1938, Guggenheim opened a gallery for modern art in London featuring Jean Cocteau drawings in its first show, and began to collect works of art. Guggenheim often purchased at least one object from each of her exhibitions at the gallery. After the outbreak of World War II, she purchased as much abstract and Surrealist art as possible. Her first gallery was called Guggenheim Jeune, the name being ingeniously chosen to associate the epitome of a gallery, the French Bernheim-Jeune, with the name of her own well known family. The gallery on 30 Cork Street, next to Roland Penrose's and E. L. T. Mesens' show-case for the Surrealist movement, the London Gallery, proved to be successful, thanks to many friends who gave advice and who helped run the gallery. Marcel Duchamp, whom she had known since the early 1920s, when she lived in Paris with her first husband Laurence Vail, had introduced Guggenheim to the art world; it was through him that she met many artists during her frequent visits to Paris. He taught her about contemporary art and styles, and he conceived several of the exhibitions held at Guggenheim Jeune. The Cocteau exhibition was followed by exhibitions on Wassily Kandinsky (his first one-man-show in England), Yves Tanguy, Wolfgang Paalen and several other well-known and some lesser-known artists. Peggy Guggenheim also held group exhibitions of sculpture and collage, with the participation of the now classic moderns Antoine Pevsner, Henry Moore, Henri Laurens, Alexander Calder, Raymond Duchamp-Villon, Constantin Brancusi, Jean Arp, Max Ernst, Pablo Picasso, Georges Braque and Kurt Schwitters. She also greatly admired the work of John Tunnard (1900-1971) and is credited with his discovery in mainstream international modernism.
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What else is significant about this time?

Answer:

Question:
Pieter Cornelis "Piet" Mondriaan, after 1906 Mondrian (; Dutch: ['pit 'mondrija:n], later ['mondrijan]; 7 March 1872 - 1 February 1944), was a Dutch painter and theoretician who is regarded as one of the greatest artists of the 20th century. He is known for being one of the pioneers of 20th century abstract art, as he changed his artistic direction from figurative painting to an increasingly abstract style, until he reached a point where his artistic vocabulary was reduced to simple geometric elements. Mondrian's art was highly utopian and was concerned with a search for universal values and aesthetics. He proclaimed in 1914: Art is higher than reality and has no direct relation to reality.
When the 47-year-old Piet Mondrian left the Netherlands for unfettered Paris for the second and last time in 1919, he set about at once to make his studio a nurturing environment for paintings he had in mind that would increasingly express the principles of neoplasticism about which he had been writing for two years. To hide the studio's structural flaws quickly and inexpensively, he tacked up large rectangular placards, each in a single color or neutral hue. Smaller colored paper squares and rectangles, composed together, accented the walls. Then came an intense period of painting. Again he addressed the walls, repositioning the colored cutouts, adding to their number, altering the dynamics of color and space, producing new tensions and equilibrium. Before long, he had established a creative schedule in which a period of painting took turns with a period of experimentally regrouping the smaller papers on the walls, a process that directly fed the next period of painting. It was a pattern he followed for the rest of his life, through wartime moves from Paris to London's Hampstead in 1938 and 1940, across the Atlantic to Manhattan. At the age of 71 in the fall of 1943, Mondrian moved into his second and final Manhattan studio at 15 East 59th Street, and set about to recreate the environment he had learned over the years was most congenial to his modest way of life and most stimulating to his art. He painted the high walls the same off-white he used on his easel and on the seats, tables and storage cases he designed and fashioned meticulously from discarded orange and apple-crates. He glossed the top of a white metal stool in the same brilliant primary red he applied to the cardboard sheath he made for the radio-phonograph that spilled forth his beloved jazz from well-traveled records. Visitors to this last studio seldom saw more than one or two new canvases, but found, often to their astonishment, that eight large compositions of colored bits of paper he had tacked and re-tacked to the walls in ever-changing relationships constituted together an environment that, paradoxically and simultaneously, was both kinetic and serene, stimulating and restful. It was the best space, Mondrian said, that he had inhabited. He was there for only a few months, as he died in February 1944. After his death, Mondrian's friend and sponsor in Manhattan, artist Harry Holtzman, and another painter friend, Fritz Glarner, carefully documented the studio on film and in still photographs before opening it to the public for a six-week exhibition. Before dismantling the studio, Holtzman (who was also Mondrian's heir) traced the wall compositions precisely, prepared exact portable facsimiles of the space each had occupied, and affixed to each the original surviving cut-out components. These portable Mondrian compositions have become known as "The Wall Works". Since Mondrian's death, they have been exhibited twice at Manhattan's Museum of Modern Art (1983 and 1995-96), once in SoHo at the Carpenter + Hochman Gallery (1984), once each at the Galerie Tokoro in Tokyo, Japan (1993), the XXII Biennial of Sao Paulo (1994), the University of Michigan (1995), and - the first time shown in Europe - at the Akademie der Kunste (Academy of The Arts), in Berlin (22 February - 22 April 2007).
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Did Piet Mondrian had a favorite colors ?

Answer:
off-white