Long-term installations mean that there is always something to see year-round at P.S.1. Works by an impressive roster of artists, such as Richard Serra, James Turrell, Pipilloti Rist and William Kentridge, are on view throughout the building. They range in scale and medium; some are obvious to the eye, while others are so ingrained in the environment, the act of discovery becomes part of the process. All are site-specific, inspired by the building's history as a school and a haven for contemporary artists. Since P.S.1 is the largest non-collecting contemporary art institution in the world, these works belong to the artists. Thus, it is due to their generosity and ongoing friendship with P.S.1 that we are able to share their creations with our visitors.