A dicrown is a figure made by joining two crowns edge to edge. There are seven dicrowns, identifying mirror images. See Catalogue of Polycrowns.
Two or more shapes are said to be compatible if there is a shape that each can tile. Here I show all known pairwise compatibilities for dicrowns. If you find a compatibility for another pair of dicrowns, please write.
See also Galvagni Figures for Polycrowns.
Last revised 2025-07-04.