The Harvard Celtic Colloquium provides a small but international audience for presentations by scholars from all ranks of scholarship and all areas of Celtic Studies. Among the topics covered are the archaeology, history, culture, linguistics, literatures, politics, religion, and social structures of the countries and regions in which Celtic languages are, or were, spoken, as well as their extended influence, from prehistory to the present. The broad range of the conference is reflected in the content of its published proceedings, which will interest both students newly attracted to Celtic Studies and senior scholars in the field.

PHCC, 33 features the annual John V. Kelleher Lecture for 2013, given by Thomas Owen Clancy, Professor of Celtic at the University of Glasgow, Scotland. Clancy discusses connections between Scottish saints' names and cults and the onomastics of settlements and topographical features gathered and investigated in preparation for a digital atlas project, "Commemoration of Saints in Scottish Place Names." In addition, PHCC, 33 includes contributions in the areas of Irish, Welsh, and Scottish history, Irish and Welsh literature and poetry, and Irish ecclesiastical learning.