 He returned to the United States in the summer of 1939, in order to attend the World's Fair, and again took to the airwaves on the subject.That autumn marked the first appearance of "Simetria", an annual magazine of art and criticism that appeared in eight editions, through 1947.Cantacuzino was one of four editors, and his office and studio, at the corner of Calea Griviței with Calea Victoriei, served as headquarters.