A Lombardi drawing of the 12-vertex <a href="https://en.wikipedia.org/wiki/Crown_graph" class="extiw" title="en:Crown graph">crown graph</a>. In this <a href="https://en.wikipedia.org/wiki/Bipartite_graph" class="extiw" title="en:Bipartite graph">bipartite graph</a>, each vertex is adjacent to five out of the six vertices of the opposite color. It is the <a href="https://en.wikipedia.org/wiki/Intersection_graph" class="extiw" title="en:Intersection graph">intersection graph</a> of the lines of the <a href="https://en.wikipedia.org/wiki/Schl%C3%A4fli_double_six" class="extiw" title="en:Schläfli double six">Schläfli double six configuration</a>.
<a href="//commons.wikimedia.org/wiki/User:David_Eppstein" class="mw-redirect" title="User:David Eppstein">David Eppstein</a>
<span class="int-own-work" lang="en">Own work</span>