The Tucson Museum of Art began to collect modern art in the early 1970s, with a generous donation of 92 objects from the Lawrence J. Heller Foundation of European and American modernists. This donation included works by notable European artists Max Weber, Jacques Lipchitz, and Marino Marini and American artists Marsden Hartley, Arthur Dove, and William Baziotes. Over time, other donations have enhanced the collection, including works by noted artists from the Southwest such as Raymond Jonson and Paolo Soleri, and South America, including Fernando Botero, among others. Ranging from the late 19th century to the mid-20th century, these works represent a shift in focus from idealized bodies and the naturalistic rendering of the landscape to works of art that resonate with a sense of lived experiences, inner vision, sensory perception, and metaphoric content. Bold use of color, experimentation, abstraction, and individuality can be seen in these works, hallmarks of modern art.