Mary Cassatt, 'Mother and Child (Maternal Kiss)', detail, 1897

Mary Cassatt at Work at the Philadelphia Museum of Art (until Sep 8) is the first large scale exhibition of the Pennsylvania-born artist’s ground-breaking career to be shown in the US in over 25 years. Cassatt (1844-1926) was a celebrated member of the French Impressionists and the only American to be formally associated with the group. Over six decades she depicted the social, intellectual and working lives of modern women. This exhibition includes over 130 of her works in various media, including prints, paintings and pastels, demonstrating her evolving practice. It also reveals new findings about her materials and working methods – which were advanced and radical for the time – based on detailed technical studies of the Philadelphia Museum of Art’s significant Cassatt holdings.