Minimalist artists used manufactured materials, industrial fabrication, and repeated forms in their work in order to challenge traditional notions of the uniqueness of works of art and the role of artistic expression and skill.
Beginning in the late 1960s, Conceptual artists questioned long-held assumptions about what defined a work of art. In emphasizing ideas over visual forms, they gave language a central role in their work.
One of the goals of Minimalist artists was to produce work that engaged the surrounding space and physically involved viewers.
The 1960s saw struggles against established power structures and institutions. Many public spaces, including streets and university campuses, became active sites of political expression, and artists began to look at such spaces as ideal sites of artistic intervention.
Performance art, which emerged in the 1960s, encompasses a diverse range of forms, including theater, dance, and music. While some performances are now known only through photo, video, or film documentation, others resulted in works of art.