The Rosengart Collection offers an exceptional overview of one of the most important private collections of modern art, formed by the Rosengart family and now the basis of the Rosengart Museum in Lucerne, Switzerland. Featuring more than 260 full-color reproductions, this volume presents masterpieces by artists such as Picasso, Klee, Chagall, Matisse, Monet and others. Scholarly essays by art historians provide analysis, evaluation and context for the works, combining visual richness and academic insight. The collection is presented not only as a catalogue but also as a narrative of modern art history through the eyes of a passionate collector. The book is structured around the works and history of the Rosengart collection. The first section introduces the origins of the collection, including Angela Rosengart?s personal recollections and her father Siegfried Rosengart?s role as an art dealer and friend to major modern artists. Subsequent sections present detailed reproductions of key works, grouped by artist and theme, with essays highlighting stylistic developments, critical interpretations and the cultural context of modernism. Artists featured include Picasso, Klee, Dufy, Chagall, Laurens, Léger, Miro, Modigliani, Monet, Pissarro, Renoir, Rouault and others. The volume also explores the transformation of the private collection into a public museum, with reflections on curation and art patronage. Angela Rosengart, daughter of Siegfried Rosengart, grew up immersed in the world of modern art. Her father was a prominent dealer and early supporter of artists such as Picasso, and together their family assembled a remarkable collection. Angela Rosengart has dedicated herself to preserving and presenting this legacy, helping establish the Rosengart Museum to make the collection accessible to the public. Pierre Daix, Christian Rümelin and Edward Beaucamp contribute scholarly texts that contextualize and analyse the works within the broader canon of twentieth-century art.