map of the cantrefi, principal forts and political centres of Gwynedd at the kingdom's maximum extent, based on the historic borders of "between Dyfi and Dee". Map based on freeware outline from welshgraphics.com. I have used the maps found in J.Beverley Smith's "Llywelyn ap Gruffudd" (1998) as a visual guide. It has taken me days.
<a href="https://en.wikipedia.org/wiki/User:James_Frankcom" class="extiw" title="w:User:James Frankcom">James Frankcom</a> (<a href="https://en.wikipedia.org/wiki/User_talk:James_Frankcom" class="extiw" title="w:User talk:James Frankcom">talk</a>)
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>