No window over sink. Maybe an old window, painted panes - mount over kitchen sink. build a light box and place string lights around hidden inner edge to illuminate? Could also be done with old strained glass window.
Tiffany stained glass window in St Luke's United Methodist Church in Dubuque, Iowa. The church has 95 stained glass windows and panels; of these, 94 are by Tiffany. It's truly a treasure chest of stained glass.