This leaded-glass window is unique among the artist’s works in glass — its abstraction and experimental effects were way ahead of their time. The design, in light-filled saturated colors, seems as though it were created by broad strokes of a painter’s brush. In the upper right corner, the opaque white glass with embedded flecks of color shows Tiffany’s earliest experimentation with a technique he would later perfect. The rough-cut chunks of glass “jewels” studded throughout give the window a three-dimensional sculptural quality. This piece was important to the artist — so important it was installed in his own New York apartment.