1282 Llywelyn the Last, the last native Prince of Wales, is killed at Cilmeri, near Builth Wells, south Wales.
1283 Dafydd ap Gruffydd, prince of Gwynedd in Wales, becomes the first person executed by being hanged, drawn and quartered.
1797 The Last Invasion of Britain begins near Fishguard, Wales.
1804 The first self-propelling steam locomotive makes its outing at the Pen-y-Darren Ironworks in Wales.
1826 The Menai Suspension Bridge, considered the world's first modern suspension bridge, connecting the Isle of Anglesey to the north West coast of Wales, is opened.
1837 A system of the civil registration of births, marriages and deaths is established in England and Wales.
1850 The Britannia Bridge across the Menai Strait between the Isle of Anglesey and the mainland of Wales is opened.
1850 The Roman Catholic hierarchy is re-established in England and Wales by Pope Pius IX.
1859 The Royal Charter is wrecked on the coast of Anglesey, north Wales with 459 dead.
1865 Welsh settlers arrive at Chubut in Argentina.
1925 Sir Malcolm Campbell becomes the first man to break the {{convert|150|mph|0|abbr=on}} land barrier at Pendine Sands in Wales. He drove a Sunbeam at a two-way average speed of {{convert|150.33|mph|0|abbr=on}}.
1934 An explosion takes place at Gresford Colliery in Wales, leading to the deaths of 266 miners and rescuers.
1941 World War II: German bombing severely damages the Llandaff Cathedral in Cardiff, Wales
1942 World War II: Germany's latest fighter, a Focke-Wulf FW190, is captured intact when it mistakenly lands at RAF Pembrey in Wales.
1955 Cardiff is proclaimed the capital city of Wales, United Kingdom.
1966 Aberfan disaster: A slag heap collapses on the village of Aberfan in Wales, killing 144 people, mostly schoolchildren.
1969 Capital punishment in the United Kingdom: Home Secretary James Callaghan's motion to make permanent the Murder (Abolition of Death Penalty) Act 1965, which had temporarily suspended capital punishment in England, Wales and Scotland for murder (but not for all crimes) for a period of five years.
2008 Kirsty Williams is elected as Leader of the Welsh Liberal Democrats. She becomes the first female leader of a political party in Wales.