Princeton is among the wealthiest universities in the world, with an endowment of US$14.2 billion. Ranked fourth largest in the United States, the university has the largest per-student endowment in the world. This is sustained through the continued donations of its alumni and is maintained by investment advisors.[15] Some of Princeton's wealth is invested in its art museum, which features works by Claude Monet and Andy Warhol, among other prominent artists.