Many people forgot about how important Owain was until the 1800s, when people started to celebrate his life. The "Young Wales" group made him the symbol of Welsh nationalism. Things that were owned by Owain were found in the National Library of France during this time period. They found his "Great Seal" and letters he had written to French people. A statue of him was made and put at Cardiff City Hall during World War I. Postcards were sold with Owain on them. The postcards were sold to make money to help soldiers who were injured in war. 