sentences:  High crosses are the primary surviving monumental works of Insular art, and the largest number in Britain survive from areas that remained under Celtic Christianity until relatively late.No examples, or traces, of the putative earlier forms in wood or with metal attachments have survived; the decorative repertoire of early crosses certainly borrows from that of metalwork, but the same is true of Insular illuminated manuscripts.Saint Adomnán, Abbot of Iona who died in 704, mentions similar free standing ringed wooden crosses, later replaced by stone versions.