9-13 August: The Calders visit Maire Gullichsen, who takes them to her villa, "Mairea," in Norrmark for a week. (Calder 1966, 206)

14 August: The Calders leave from Turku, Finland, and take a boat to Stockholm, arriving the next day. They stay in the Grand Hotel and visit Eric Grate, a Swedish sculptor. (CF, passport; Calder 1966, 208)

26-27 August: Departing Malmoe, Sweden, the Calders take a train through Denmark and Germany, and arrive in Paris. (CF, passport; Calder 1966, 208)

31 August-11 September: The Calders depart Paris for Antwerp, set sail the next day on the Europa, and arrive in New York. (CF, passport; Calder 1966, 208)

12 November: Calder is selected by The New York Times Book Review as one of the ten best children's book illustrators of the last fifty years. (New York Times, 12 November)

5 December-14 January 1951: Massachusetts Institute of Technology, Cambridge, exhibits "Calder," a retrospective. James Johnson Sweeney installs the exhibition while Calder recovers from an automobile accident. (CF, exhibition file; Calder 1966, 209)

24 January: After two years of filming and production, Works of Calder previews at the Museum of Modern Art. Directed and filmed by Herbert Matter, produced and narrated by Burgess Meredith, with music by John Cage. (CF, project file)

5 February: Calder participates in a symposium, "What Abstract Art Means to Me," sponsored by the Museum of Modern Art in conjunction with the exhibition "Abstract Painting and Sculpture in America." The idea of detached bodies floating in space, of different sizes and densities, perhaps of different colors and temperatures, and surrounded and interlarded with wisps of gaseous condition, and some at rest, while others move in peculiar manners, seems to me the ideal source of form. (Calder, "Abstract Art")

17 April-2 June: Institute of Contemporary Arts, Washington, D.C., exhibits "Sculptures by Alexander Calder." (CF, exhibition file)

April: In Washington, D.C., Calder sees Jean Davidson, a friend he had first met in 1944, and invites him to visit Roxbury. (Calder 1966, 212)