This paper introduces the notion of a query that describes a visualization request in terms of a universe of concepts, which includes but is not limited to Views, Operators, and Parameters. In the presence of specifications based on these concepts, users may be able to request for what properties they want to see in their visualizations (i.e., the graphical analogues of some dataset) without having to specify how to generate them, and more importantly, without being fully aware of a wide range of toolkit specific implementation details. The result of a query is a visualization that satisfies declarative user-defined criteria for creating visualizations. This paper explores the requirements for visualization queries and exemplifies how such queries could be used to drive the generation of gravity contour maps using two popular visualization toolkits. Additionally, the paper highlights the infrastructure requirements that could support visualization queries.