There are many methods to stabilize an infinite-dimensional linear autonomous control system which is stabilizable. The challenge is to find a exponentially stabilizing feedback control that is as simple as possible. Riccati theory provides a nice feedback control, but numerically solving Riccati equations may be difficult for infinite-dimensional control systems. The Proper Orthogonal Decomposition (POD) offers a popular method to reduce large-dimensional systems. In the present paper, we show that, under appropriate assumptions, a Riccati feedback law derived from a finite-dimensional system obtained by the POD method stabilizes the infinite-dimensional system.