De Valera was an active "gaeilgeoir" (Irish language enthusiast). In 1908 he joined the Conradh na Gaeilge (the Gaelic League), where he met Dubhghlas de hÍde, later first President of Ireland, and also Sinéad Flanagan, another teacher who he married on 8 January 1910 at St Paul's Church, Arran Quay, Dublin.