Coinciding with the work to expand the Kunstmuseum Basel, a selection of over one hundred masterpieces from its twentieth-century collection are on show in the Museo Reina Sofía. This ensemble aims to offer a broad panorama of the transition of modern and contemporary art, including examples of such diverse movements as Expressionism, Cubism, Purism, Abstraction, Constructivism, Minimalism, German Post-expressionism, Post-war American Abstraction and Pop Art. Also, two standout art collections from early modernism are brought together, and today form part of the holdings of the Kunstmuseum Basel (Switzerland), the Im Obersteg Collection and the Rudolf Staechelin Collection, that look to delve deeper into the catalysing phenomenon of collecting at the start of modernism and emphasise its central position in the framework of modern art, together with the work of artists, critics and curators.