Henriette Hertz is now known mainly through her establishment of the Bibliotheca Hertziana, granted to the
Kaiser Wilhelm Institute (KWI) in 1913 (from 1953, the
Max Planck Society). In 1889 Hertz, with her wealthy friends
Frida and
Ludwig Mond, rented parts of the Palazzo Zuccari in Rome. Backed by Ludwig Mond's fortune earned in the British soda industry, the Monds and Hertz maintained an "open house"
salon in Rome; regular visitors included
Gabriele d'Annunzio, the Italian mathematician Pietro Blaserna,
Paul Deussen, the writer Olga von Gerstfeldt and the art historian Ernst Steinmann,
Wolfgang Helbig,
Theodor Mommsen,
Giovanni Morelli, and the violinist
Teresina Tua, a/k/a Teresa Tua. In 1904, the Palazzo was purchased in Hertz's name, along with an adjoining building, the Casa dei Preti. With the support of Frida Mond and Steinmann, Hertz began to collect books on Italian art. During the ensuing years (1904–1912), Hertz collected the core of a research library focussed upon the art of Italy, and particularly of Rome. Extensive re-modelling of the palazzetto enabled the ground floor to be used for the library, which was installed in the winter of 1910–1911. The Sala di Disegno in the palazzetto has retained its original early twentieth-century furnishings, and was one of the five rooms originally used for the library. Despite opposition from
Paul Fridolin Kehr, director of the
Prussian Historical Institute in Rome, the Bibliotheca Hertziana was gifted to the KWI in 1912 with Ernst Steinmann as its foundation director. The Bibliotheca hosted the tenth International Congress of Art History of 1912, which featured a plenary paper presented by
Aby Warburg. ==The Bibliotheca Hertziana and the KWI==