Cofiwch Dryweryn, translated into English as “Remember Tryweryn”, is one of Wales’ most iconic slogans, a powerful reminder of an event that reshaped Welsh cultural and political history.

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In Welsh, Cofiwch Dryweryn literally means “Remember Tryweryn”. This phrase, first painted on a simple cottage wall in Ceredigion in the early 1960s, has become a symbol of remembrance, resistance, and Welsh national pride.
A memorial chapel was built in 1965 on the banks of the reservoir to commemorate the flooding of Capel Celyn. The chapel has been completely restored in recent years.
The original Cofiwch Dryweryn words were painted on a wall of an uninhabited cottage near to the small village of Llanrhystud, Ceredigion. This village is some 10 miles south of Aberystwyth. The words Cofiwch Dryweryn have become a self-fulfilling prophecy - without question what occurred in the Tryweryn valley in the 1950's and 1960's will always be remembered!
In the 1950s and 1960s, plans were made by Liverpool City Council to build a large reservoir in the Tryweryn Valley in north Wales to supply drinking water for Liverpool and Wirral. A private Act of Parliament was passed in 1957, bypassing Welsh local authorities and public consultation.
As a result:
In response to this loss, Welsh author and cultural figure Meic Stephens (with Rodric Evans) painted the first Cofiwch Dryweryn message on a ruined farmhouse wall near Llanrhystud on the A487 coastal road.
Despite the humble original, the mural took on lasting significance, reminding people locally and internationally not to forget Tryweryn. It is interesting to note that Meic Stephens, a prolific author described these two words as "my most famous statement, my best-known poem, my most eloquent speech, and my most influential political act.
In 2005, Liverpool City Council issued a formal apology for the hurt caused by the Tryweryn project, acknowledging the insensitivity of the original decision that led to Capel Celyn’s destruction, although the apology received mixed reactions in Wales. It is an understatement to say that the apology was not universally accepted in Wales!!!
Over the decades, Cofiwch Dryweryn has become more than a piece of graffiti:
(targets: Remember Tryweryn today, Welsh cultural memory)
The phrase Cofiwch Dryweryn still resonates because it recalls:
Whether you’re visiting Wales or exploring its history online, Cofiwch Dryweryn remains a meaningful tribute, encouraging everyone to remember Tryweryn and the people of Capel Celyn.