<P> The flag of Wales (Welsh: Baner Cymru or Y Ddraig Goch, meaning the red dragon) consists of a red dragon passant on a green and white field . As with many heraldic charges, the exact representation of the dragon is not standardised and many renderings exist . </P> <P> The flag incorporates the red dragon of Cadwaladr, King of Gwynedd, along with the Tudor colours of green and white . It was used by Henry VII at the Battle of Bosworth in 1485, after which it was carried in state to St Paul's Cathedral . The red dragon was then included as a supporter of the Tudor royal arms to signify their Welsh descent . It was officially recognised as the Welsh national flag in 1959 . Several cities include a dragon in their flag design, including Cardiff, the Welsh capital, and the Welsh - founded city of Puerto Madryn in Argentina . </P> <P> The flag was granted official status in 1959, but the red dragon itself has been associated with Wales for centuries, though the origin of the adoption of the dragon symbol is now lost in history and myth . A possible theory is that the Romans brought the emblem to what is now Wales during their occupation of Britain in the form of the Draco standards borne by the Roman cavalry, itself inspired by the symbols of the Dacians or Parthians . The Olm (Proteus anguinus) of Slovenia bear a similarity in miniature to the Draco standard and they are referred to as baby cave dragons by the locals . The green and white stripes of the flag were additions by the House of Tudor, the Welsh dynasty that held the English throne from 1485 to 1603 . Green and white are also the colours of the leek, another national emblem of Wales . </P> <P> The oldest known use of the dragon to represent Wales is from the Historia Brittonum, written around 830; the text describes a struggle between two serpents deep underground, which prevents King Vortigern from building a stronghold . This story was later adapted into a prophecy made by the wizard Myrddin (or Merlin) of a long fight between a red dragon and a white dragon . According to the prophecy, the white dragon, representing the Saxons, would at first dominate but eventually the red dragon, symbolising the Britons, would be victorious and recapture Lloegr . According to the legend, this victory would be brought about by Y Mab Darogan . This is believed to represent the conflict in the 5th and 6th centuries between the Britons and the invading Saxons . A version of the tale also appears as part of the poem' Cyfranc Lludd a Llefelys' in the Mabinogion . One twelfth - century account of this is Geoffrey of Monmouth's Historia Regum Britanniae, where he states Merlin's prophecies . </P>

Why is there a dragon on welsh flag
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