- Introduction to Bede. On the Temple, tr. Seán Connolly, Translated Texts for Historians, vol. 21 (Liverpool University Press, 1995) xvii–lv.
- ‘Islands and idols at the ends of the earth: exegesis and conversion in Bede’s Historia ecclesiastica’, in Bède le vénérable. Entre tradition et posterité, ed. Stephane Lebecq, Michel Perrin and Olivier Szerwiniack, (Lille, 2005) 119–145.
- ‘Bede on seeing the God of gods in Zion’, in Text, image and interpretation. Studies in Anglo-Saxon literature and its Insular context in honour of Éamonn Ó Carragáin, ed. Alastair Minnis and Jane Roberts, (Brepols, Turnhout, 2007) 3–29.
- ‘The multitude of isles and the corner-stone: topography, exegesis and the identity of the Angli, in Bede’s Historia ecclesiastica’, in Anglo-Saxon Traces, ed. Jane Roberts and Leslie Webster (Arizona Center for Medieval and Renaissance Studies, Tempe, 2011) 201–27.
- ‘St Paul and the sign of Jonah. Theology and Scripture in Bede’s Historia Ecclesiastica’, (Jarrow Lecture, 2014.).
- ‘Bede and Monothelitism’ (In press and forthcoming).
- ‘Bede and the Mediator’ (Forthcoming).
- ‘Reading the Scriptures in the Life of Columba’, in Studies in the cult of St Columba, ed. Cormac Bourke (Dublin, 1997) 80–106.
- ‘The wisdom of the scribe and the fear of the Lord in the Life of St Columba’, in Spes Scotorum. Hope of Scots, ed. Dauvit Broun and Thomas Owen Clancy (Edinburgh, 1999) 159–211.
- ‘Adomnán and the art of teaching spiritual sons’, in Adomnán of Iona: theologian, lawmaker and peacemaker, ed. Jonathan Wooding, Thomas O’Loughlin et al. (Dublin, 2010) 69–94.
- ‘Columba at Clonmacnoise’, in Sacred Histories. A Festschrift for Máire Herbert, ed. John Carey, Kevin Murray and Caitríona Ó Dochartaigh (Dublin, 2015) 380–390.
- ‘The Bible as Map, On Seeing God and Finding the Way: Pilgrimage and Exegesis in Adomnán and Bede’, in Place and Space in the Medieval World, ed. Meg Boulton, Jane Hawkes and Heidi Stoner (Routledge, New York and London, 2018) 210–226.
- ‘Candidus et rubicundus: an image of martyrdom in the Lives of Thomas Becket’, Analecta Bollandiana 99 (1981) 303–14.
- ‘The double martyrdom of Thomas Becket: hagiography or history?’, Studies in Medieval and Renaissance History 7 (1985) 185–247.
- ‘Iconoclasm’, review article, Eastern Churches Review 10 (1978) 165–9.
- Studies in the iconography of the Virtues and Vices in the Middle Ages (New York and London, 1988).
- ‘Early medieval text and image: the wounded and exalted Christ’, Peritia 6–7 (1987–88) 72–118.
- ‘The medieval iconography of the two trees in Eden’, in A walk in the garden: biblical, iconographical and literary images of Eden, ed. P. Morris and D. Sawyer, Journal for the Study of the Old Testament, supplement series 136, (Sheffield, 1992) 167–204.
- ‘Patristic and Insular traditions of the Evangelists: exegesis and iconography’, in Le isole Britanniche e Roma in eta romanobarbarica, ed. A. M. Luiselli and Eamónn Ó Carragáin (Rome, 1998) 49–94.
- ‘Celtic art and the Gospel’, Search 24 (2001) 34–42.
- ‘The art of authority’, in After Rome, ed. Thomas Charles-Edwards (Oxford, 2003) 141–189.
- ‘St John the Evangelist: between two worlds’, in Insular and Anglo-Saxon Art and Thought in the Early Medieval Period, ed. Colum Hourihane (Penn State University Press, 2011) 189–218.
- ‘Seeing the crucified Christ: image and meaning in early Irish manuscript art’, in Envisioning Christ on the Cross in the early medieval West, c.500–1200, ed. Juliet Mullins and Jenifer Ní Gradaigh (Dublin, 2013) 52–82.
The Anglo-Saxon Tradition
- ‘An Anglo-Saxon portable altar: inscription and iconography’ (with Elisabeth Okasha), Journal of the Warburg and Courtauld Institutes 47 (1984) 32–51.
- ‘The rough-hewn cross in Anglo-Saxon art’, in Ireland and insular art A.D. 500-1200, ed. Michael Ryan (Royal Irish Academy, Dublin, 1987; reprinted 2002) 153–58.
- ‘St John as a figure of the contemplative life: text and image in the art of the Anglo-Saxon Benedictine reform’, in St Dunstan: his life, times and cult, ed. N. L. Ramsay, M. J. Sparks and T. Tatton-Brown (Woodbridge, 1992) 165–85.
- ‘Testo e immagine nella riforma benedettina anglosassone’, in Benedetto l’Eredità Artistica, ed. Roberto Casanelli and E. López-Tello García, (Milan 2007) 95–110. Simultaneous publication in German (Benediktinische Kunst).
- ‘Signs of the Cross’, in The History of British Art 600-1600, ed. Tim Ayers (Tate Britain and the Yale Center for British Art, 2008) 176–99.
Insular Gospel Books
- ‘The Hiberno-Latin tradition of the Evangelists and the Gospels of Mael Brigte’, Peritia 9 (1995) 290–309.
- ‘Gospel harmony and the names of Christ in Insular gospel books’, in The Bible as book: the manuscript tradition, ed. J. Sharpe and K. Van Kampen (London, 1998) 73–88.
- ‘“Know who and what he is”: the context and inscriptions of the Durham Gospels Crucifixion image’, in Making and meaning in Insular Art, ed. Rachel Moss, (Dublin, 2007) 301–16.
- ‘The image of orthodoxy, the mysterium Christi and Insular Gospel books’, in L’Irlanda e gli irlandesi nell’alto medioevo, Settimane di studio della fondazione centro italiano di studi sull’alto medioevo, LVII (2010) 651–705.
- ‘The iconography of the St Gall Gospels’, forthcoming in the commentary volume accompanying the facsimile, ed. Damian Bracken.
The Codex Amiatinus
- ‘“All that Peter stands for”: the romanitas of the Codex Amiatinus reconsidered’, in Anglo-Saxon/Irish relations before the Vikings, ed. James Graham-Campbell and Michael Ryan, Proceedings of the British Academy 157 (Oxford, 2009) 367–95.
- ‘The library of Scripture: views from Vivarium and Wearmouth-Jarrow’, in New offerings, ancient treasures. Studies in medieval art for George Henderson, ed. Paul Binski and Will Noel (Stroud, 2001) 3–39.
The Book of Kells
- ‘The Book of Kells, folio 114: a mystery revealed yet concealed’, in The age of migrating ideas: early medieval art in Britain and Ireland, ed. J. Higgitt and R. M. Spearman (Stroud, 1993) 106–114.
- ‘Exegesis and the Book of Kells: the Lucan genealogy’, in The Book of Kells, ed. Felicity O’Mahony (Aldershot, 1994) 344–97. Reprinted in Scriptural interpretation in the Fathers, ed. Thomas Finn and Vincent Twomey (Dublin, 1995) 315–55.
- ‘The Book of Kells and two Breton gospel books’, in Irlande et Bretagne. Actes du colloque de Rennes 1993, ed. C. Laurent and H. Davis (Rennes, 1994).
- Entry on the Book of Kells, folios 29 and 34, in Histoire de l’écriture, ed. A. M. Christin (Paris, 1997; English version 2002).
- ‘Two pages from the Book of Kells’, in Visual practices across the University, ed. James Elkins, (Munich, 2007) 164–69.
- ‘The Book of Kells, folio 114’, in Treasures of Irish Christianity: people and places, images and texts, ed. Salvador Ryan and Brendan Leahy (Dublin, 2012) 49–52.
- 'The body of Christ in the Book of Kells', in Proceedings of the International Symposium of Theology: The Ecclesiology of Communion (Dublin: Veritas, 2013), 52-62.