A polycrown is a figure made by joining one or more crowns edge to edge. See Catalogue of Polycrowns. The terms crown and polycrown were introduced by Irmi Beyer.
A Galvagni figure is a figure that can be tiled by a polyform in more than one way—a kind of self-compatibility figure. Galvagni figures first appeared in Erich Friedman's Math Magic for November 2004.
Here I show all known minimal Galvagni Figures for polycrowns with 1, 2, or 3 cells. If you find a Galvagni Figure for another polycrown, please write.
See also
Last revised 2025-07-24.