The man known as 'Dic Penderyn' will be commemorated today in Aberavon. Twenty five people took part in the walk from Pyle to St Mary's Church in Aberavon.
Penderyn was a Welsh miner who was hanged nearly 200 years ago. He was sentenced to death for stabbing a solider in the Merthyr uprising of 1831.
At that time people protested his innocence, and the case has been cited as a grave miscarriage of justice for generations.
ITV Wales Cymru news has been shown a letter of support, from Penderyn's relatives, over a call for a posthumous pardon.