Three-Dimensionalism is a position on how objects persist over time. Three-Dimensionalism is standardly construed as the claim that objects persist by being “wholly present” at each moment of their careers and is typically endorsed in opposition to the standard four-dimensionalist claim that objects extend through time by having temporal parts at each moment of their careers. This article reviews and highlights serious shortcomings of various proposals for filling out the three-dimensionalist account of persistence through claims about persisting objects’ parts or locations. This article suggests that Three-Dimensionalism is best understood as a position on the grounds for facts about objects’ presence over time.