15 May-11 September: Calder constructs his most ambitious mobile to-date, International Mobile, for the Third International Exhibition of Sculpture, Philadelphia Museum of Art in collaboration with the Fairmount Park Art Association. (CF, exhibition file))

Before 2 May: Upon returning home from Brazil, Calder crafts a large figa brooch for Henrique Mindlin's wife, Helena Mindlin, and sends it to her in Brazil: Thank you, thank you, thank you ever so much for the most beautiful figa I have ever seen. You managed to make many females terribly envious of me, and this makes me oh! so happy! Calder eventually makes at least twenty pieces of jewelery in the figa motif, nearly all as gifts for family and friends. (CF, Helena Mindlin to Calder)

Summer: Calder builds a house for his mother on the Roxbury property.

30 November-17 December: Buchholz Gallery/Curt Valentin, New York, exhibits "Calder." The catalogue includes "The Studio of Alexander Calder" by Andre Masson and illustrations by Calder of the objects exhibited. (CF, exhibition file)

6 January: "Happy As Larry," a play written by Donagh MacDonagh and directed by Burgess Meredith with sets by Calder, opens in New York at the Coronet Theatre. (CF, project file)

4-10 May: The Calder family sails from New York on the Ile de France and arrives in Le Havre.

Mid-May: In Paris, the Calders rent an apartment for four months on rue Penthievre from their friend, Mede Valentine. (CF, passport; Calder 1966, 204; AAA, Calder to Warner, 5 February)

30 June-27 July: Galerie Maeght, Paris, exhibits "Calder: Mobiles and Stabiles." Calder, encouraged by Christian Zervos (publisher of Cahiers d'Art) to exhibit at Galerie Maeght, also illustrated the catalogue and the exhibition poster. The Nationalmuseum, Stockholm, purchases a mobile and the Musee National d'Art Moderne, Paris, purchases Le 31 Janvier. (CF, exhibition file; Lipman 1976, 334)

July: The Calders travel around France visiting the caves of Lascaux, and Ritou Nitzschke and Andre Bac in La Roche Jaune, Brittany. (Calder 1966, 206; Lipman 1976, 334)

2-8 August: The Calders leave Paris and take a train to Antwerp. From there, the family takes a Finnish ship Arcturus to Helsinki. (CF, passport)