The Encyclopaedia Cambrensis or Y Gwyddoniadur Cymreig was the most ambitious encyclopedia in the Welsh language.
[1] The general editor was John Parry, Gee's brother in-law and lecturer at the College of Bala.
[4] The Encyclopaedia Cambrensis includes nearly 9,000 pages in double columns.
While the number of articles relating to the Bible and theology is significantly higher than expected in such a reference work today, it also includes a large number of biographical articles, articles on Welsh history and literature, science, geography and other Celtic nations.
Among the numerous contributors were Owen Morgan Edwards and John Morris-Jones.