Rinus Roelofs has exhibited numerous planar and polyhedral sculptures made up of two layers that weave over and under each other to form a single connected surface. I present a technique for creating sculptures in this style that are inspired by the geometric structure of Islamic star patterns. I first present a general approach for constructing interwoven two- layer sculptures, and then specialize it to Islamic patterns in the plane and on polyhedra. Finally, I describe a projection operation that bulges the elements of these designs into undulating dome shapes.