In May 1938, he took his first trip to the United States, and in December, held a radio program about the Romanian pavilion at the New York World's Fair. 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. Over the course of the magazine's run, he published numerous studies, articles, reviews and notes. During the 1940 Vrancea earthquake, the Carlton Bloc collapsed, initially drawing the ire of the National Legionary State authorities against its architect, Cantacuzino. However, an inquiry determined that the building fell due to other causes, and he was not prosecuted.