From BBC News:
About 800,000 pages of documents, some going as far back as the 14th Century, have been placed on the National Library of Wales' website.
Among the wills available at the click of a button are Twm Sion Cati's, known as the Welsh Robin Hood, and hymn writer William Williams, Pantycelyn.
Officials said it had taken more than five years to digitise the documents.
The National Library of Wales in Aberystwyth said the wills dated from the 14th Century until 1858, when civil probate was introduced, and 1,000 of them were written in Welsh.