Entwined circular rings ("In elkaar gevlochten cirkelvormige ringen") was the title that M.C. Escher gave to a little research project he started around 1945. Although the start of this project was very well set up he didn't come further than the first page on which he shows us how you can make patterns of entwined circular rings based upon a square grid. Because I often make use of these kinds of patterns in my own work I decided to pick up this research project and try to find out how Escher would have continued this project.