Towner described Luigi Grassi as the "[m]ost venerable, and temperamental, of all the profesori,...the grand old man of antiquary Florence." A sale of his collection of Renaissance jewels and fifteenth- to seventeenth-century objets d'art and curios took place in 1927 at the American Art Association in New York.
Towner, Wesley. The Elegant Auctioneers. Completed by Stephan Varble. New York, 1970: 381, 422-423.
Edgar Peters Bowron, ed/ Buying Baroque : Italian seventeenth-century paintings come to America. , University Park, Pennsylvania : The Frick Collection, The Pennsylvania State University Press, 2017.