Henriette Hertz

Henriette Hertz (6 January 1846, Cologne - 9 April 1913, Rome) was a German-born philanthropist and art collector. She donated the Palazzo Zuccari to house the Bibliotheca Hertziana in 1912.

Hertz attended school in Cologne, where her family had settled in 1844. Henriette was the fourth child, the eldest girl, of seventeen children, of which seven survived infancy. She spent her school years studying painting and the history of art. In 1871, Hertz, who had been born Jewish, converted to Protestantism.

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 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 , 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.

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