Two free walking tours will be held at Merthyr Dyfan Cemetery to examine the background behind the 1919 race riots in Barry.
In June 1919, rioting broke out in several dock towns - including Newport, Cardiff and Barry, where the fatal stabbing of a labourer in Cadoxton led to three days of unrest.
The walking tours will examine how the riots were driven by high unemployment, insecurity and a fear of foreigners, witnessed killings, mobs on the rampage and a blind hatred for anyone of a different colour or creed.

The free event on Sunday 19th October, held by Barry Town Council and the Victorian Barry Experience as part of Black History Month, will be followed by refreshments at Merthyr Dyfan Chapel.
Donations will also be taken for the Town Mayor's chosen charities, Mind in the Vale and Valeways.
Talks begin at 12.30pm and 2pm but advance booking is required via Barry Town Council on Ticketmaster.

Plans are under consideration to build over 200 houses in a sleepy Welsh village
Sanitary disposal bins introduced in men's public toilets following "Bins for Boys" campaign
Officers called to Dinas Powys Woods after young person enters the river
Vale Council signs off placemaking plan for Barry
Plans filed to use Blackweir Fields for a series of live events this summer
Plans filled for controversial housing development in Cowbridge
Cardiff Council pledges to work with new Welsh Government to tackle trouble-plagued hospital
RNLI issues Sully Island safety advice after first call out of the year to the Island
Morio Lounge on course to open at Nell's Point in May
Vale Council appoints specialist contractors to carry out road improvements
Three men jailed for their roles running a drugs line which supplied cocaine in Barry
Police appeal for witnesses after fatal Penarth Road collision
New Beach and country park facilities opened following major investement
RNLI centre at Barry Island welcomes lifeguards back to Whitmore Bay
Severn tidal lagoons progress