In this chapter, we have worked through examples on embedding Matplotlib figures inside a simple GTK+3 window, adding the Matplotlib navigation toolbar, plotting data in an interactive framework, and using Glade to design a GUI. We have kept the examples simple to highlight the important parts, but we encourage readers to explore further possibilities. GTK+3 is not the only GUI library that can be used. In the coming chapters, we'll see how to use two other important libraries!