Here’s what I’ve been printing lately.
These are called Girih tiles. They’re a set of five different shaped tiles that are used in Islamic architecture. As you can see, when you fit them together, the lines on them form knot patterns.
They also have some interesting mathematical properties. If you’re familiar with Penrose tiles, and the way they can tile the plane with five-fold symmetry and no repeats, then you may be surprised to find out that these tiles have the same properties and were in use more than five centuries before Roger Penrose’s paper in 1974.