The Vita tripartita Sancti Patricii (The Tripartite Life of Saint Patrick) is a bilingual hagiography of Saint Patrick, written partly in Irish and partly in Latin.
Kathleen Mulchrone had assigned a late ninth century date based on the latest historical reference in the text.
Máire Herbert summarises: While there are some textual references indicative of ninth-century date, in my opinion the text was continued thereafter and completed around or after the mid-tenth century.
Some decades later, in the eleventh century, the text was edited as a tripartite homily designed for preaching during celebration of the saint's feast.
James F. Kenney said that the Tripartite Life represents "the evolution of the Patrick legend nearly completed.