The Pursuit of Diarmuid and Gráinne (
Irish:
Tóraigheacht Dhiarmada agus Ghráinne or
Tóraíocht Dhiarmada agus Gráinne in modern spelling) is an
Irish prose narrative surviving in many variants. A tale from the
Fenian Cycle of
Irish mythology, it concerns a
love triangle between the great warrior
Fionn mac Cumhaill, the beautiful princess
Gráinne, and her paramour
Diarmuid Ua Duibhne. Surviving texts are all in Modern Irish and the earliest dates to the 16th century, but some elements of the material date as far back as the 10th century.