The sitter in the present portrait resembles that of Angela Calzettara exhibited by W.R. Jeudwine in 1966, no. 13, and now in the Stanford University Museum of Art,, J.T. Spike, Baroque Portraiture in Italy, exhib. cat., University of California at Stanford, 1984-5, app. fig. 31, and the Lady with a veil in the Albertina, V. Birke and J. Kertész, Die Italienischen Zeichnungen der Albertina, Vienna, 1994, II, no. 1736.
According to Professor Krautheimer's notes, Jacob Bean confirmed the attribution to Leoni in 1988.