In 1971-1972, near the end of his life, he spent lengthy periods in Rome, writing a poem about Trajan that remains unpublished. Theodorescu translated widely, in particular Soviet literature (Vladimir Mayakovsky, Aleksandr Tvardovsky), but also authors who included William Blake, Jérôme Carcopino and Lino Curci. He collected folklore ("Izvoare fermecate", 1958) and wrote prolifically for children, although some of these works are now irrecoverable. He sometimes used the pen names Radu Lăncieru, Victor Sângeru, C. Tudor and C. Tudoran.