included 165 works by 20th-century masters such as Braque, Matisse, Klee, and Giacometti, with a unique group of 85 works by Picasso. In 1977, Berggruen published Douglas Cooper's catalogue raisonné of Juan Gris. He finally resigned as director of the Paris gallery in 1980 in order to devote himself to collecting and dealing. In 1988, he donated 90 Klee works to the Metropolitan Museum of Art in New York, although he later expressed fear that his donation would go unnoticed in the museum's own vast collections. That same year, he exhibited his collection at the Musée d'Art et d'Histoire in Geneva. In 1990, he lent a good part of his collection to the National Gallery in London, where he exhibited works—including Seurat's landmark painting Les Poseuses (1886)—until 2001. In 1995, the German government lent him an apartment in Berlin and gave him an art museum opposite the Charlottenburg Palace. The collection, then comprising 118 works, opened to the public in 1997. At the time, then German culture minister Ulrich Roloff-Momin described it as "the most meaningful art transfer in Berlin's post-war history." In 2000, he finally sold the art collection to the Prussian Cultural Heritage Foundation: the collection of 165 works (including 85 Picassos), which Berggruen valued at €750m, was purchased by the PCHF at about a quarter of that value. It additionally includes over sixty works by Paul Klee, and twenty by Matisse. For his achievements, Berggruen was named a Commandeur of the Legion of Honour by the French government, received the Grand Cross of the Order of Merit of the Federal Republic of Germany in 1999, and was named an honorary citizen of Berlin. He additionally received the Jewish Museum Berlin's Award for Understanding and Tolerance in 2005, and was bestowed an honorary Doctorate of Humane Letters from Adelphi University in 1993. In 2008, a Berlin school was named the Heinz-Berggruen-Gymnasium in his honor. An honorary trustee of the Metropolitan Museum, he additionally served on the board of the Berlin Philharmonic. In 2016, Berggruen's Klee collection was exhibited in its entirety to inaugurate the Met Breuer, and traveled to the National Gallery of Canada in 2018. Personal life Berggruen was married twice and had four children. Berggruen, who until his death maintained homes in Paris, Gstaad, and Berlin (and in Geneva and New York before that), was quoted as saying "I am neither French nor German, I am