Having grown up with the knowledge of the fight to overthrow Norman rule in the 12 century in my local area, there is now a festival to celebrate that at the centre of Norman control- Kidwelly Castle!
Looks like fun! Festival runs on 18th - 19th July,
Check out the article below for a little bit of Welsh history and details of the festival.
http://www.cymruculture.co.uk/featuredarticles_90999.html
Thank you for posting this 
We’ll be in Wales in that period and Kidwelly was on our list to visit, so we’ll definitely go