The Black Death arrived in Wales in early 1349, probably carried from southern England, and by mid-August it was rife, wiping out approximately 25% of the population. 

The  subsequent social changes following the Black Death were as profound in Wales, as other parts of Britain, with fewer people being available to work the land and influence of the Church suffering due to in part, the decrease in the number of monks.   

On August 14th 1979, the longest lasting rainbow in meteorological history, was recorded over on the Gwynedd coast in North Wales, lasting for 3 hours.     

On 14th August 1834, the Poor Law Amendment Act was introduced in England and Wales.

The act introduced Poor Law Unions, of which there were 583 in England and Wales by 1839.  The unions were made up by combining parishes and each union was responsible for providing a workhouse for the accommodation of those unable to support themselves financially.  However, people dreaded being forced to enter the workhouse, as living conditions were often appalling and families separated on entry.  .

They were often the subject of protest, such as the workhouse at Carmarthen, which was attacked by the 'Rebecca Rioters' in 1843 as part of their campaign of protests across south-west Wales.  

Richard Parks (born 14th August 1977 in Pontypridd) is a former Wales rugby union international, who was forced to retire from playing due to a shoulder injury.

Parks then took up mountain climbing to raise money for charity and notably in 2011, set a new record for the 737 challenge.  That is to climb the highest peak in each of 7 continents of the world, as well as the North Pole, the South Pole and Everest.  

On 14 August 1884,  construction of the dock at Barry Island was authorised, following the passing of.the Barry Dock and Railway Company Act.

Suffering from the restrictions on capacity and the monopoly of the coal transporting market between The Taff Vale Railway and Cardiff Docks, a group of mine owners, led by David Davies, chairman of the Ocean Merthyr company proposed the development of an alternative route running to new docks at Barry.  The venture proved to be a success and by 1910, Barry was exporting more coal than its competitor at Cardiff.

However, the subsequent decline in production of  South Wales coal, following the First World War, resulted in Barry Docks becoming better known as the centre for the scrapping of British Railways steam locomotives.

Brian Nancurvis (14 August 1937 9 January 2012), who fought under the name Brian Curvis as a professional, was a boxer from Swansea, who was active from 1959 to 1966. He fought as a Welterweight, becoming British welterweight champion in 1960. He retired as undefeated champion and is the only welterweight to have won two Lonsdale Belts outright. The four defeats in his professional career were all to foreign boxers; he was never beaten by a British boxer