Richard Serra, one of the greatest artists of the past 50 years, a linchpin of the post-minimalist scene in late 1960s and early 1970s New York and later the creator of vast steel ellipses and spirals, died on Tuesday 26 March. We mark the passing of this titan of sculpture with Donna De Salvo, the senior adjunct curator of special projects at the Dia Foundation, whose Dia Beacon space has several major works by Serra on permanent view.Käthe Kollwitz. The Mothers (Mütter) (1918)Collection Ute Kahl, Cologne. Fuis PhotographieThere are a host of exhibitions focusing on Expressionist art in the US and Europe in 2024 and in this episode we focus on two of them. The first ever Käthe Kollwitz retrospective in New York is taking place at the Museum of Modern Art or MoMA, while other shows dedicated to her are taking place in Frankfurt and Stockholm. We speak to Starr Figura, the curator of MoMA’s show, which opens this weekend, about Kollwitz’s extraordinary work and life.Franz Marc Cows, Red, Green, Yellow (1911)Lenbachhaus MunichThen, we talk to Natalia Sidlina, the curator of Expressionists: Kandinsky, Münter and the Blue Rider, a major survey opening at Tate Modern next month of the German Expressionist group, which looks anew at the deep friendships that formed the basis of the group, their international outlook and their multidisciplinary output.Richard Serra’s work is on long-term view across five galleries at Dia Beacon, New York, USKäthe Kollwitz, Museum of Modern Art, 31 March-20 July; Städel Museum, Frankfurt, until 9 June; SMK – National Gallery of Denmark, Copenhagen, 7 November-25 February 2025Expressionists: Kandinsky, Münter and the Blue Rider, Tate Modern, London, 25 April-20 October 2024; Gabriele Münter: the Great Expressionist Woman Painter, Thyssen Bornemisza, Madrid, 12 November-9 February 2025Further expressionist exhibitions in 2024:The Anxious Eye: German Expressionism and Its Legacy, National Gallery of Art, Washington DC, until 27 May; Munch to Kirchner: The Heins Collection of Modern and Expressionist Art, Dallas Museum of Art, Texas, US, until 5 January 2025; Munch and Kirchner: Anxiety and Expression, Yale University Art Gallery, New Haven, Connecticut, US, until 23 June; Erich Heckel, Museum of Fine Arts Ghent, Belgium, 12 October-25 January 2025