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The Dark-Age Cymru Cycle explores the transformation of Wales between the end of Roman rule and the emergence of the medieval Welsh kingdoms.
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Through the stories of the Britons, warlords, and saints who shaped this age, it examines how new communities, kingdoms, and religious traditions developed across the landscape.
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Building upon the peoples, beliefs, and cultural foundations explored in the Ancient Cymru Cycle, it traces the formation of a distinctly Welsh identity.
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The cycles that follow continue this story, exploring how the kingdoms, traditions, and institutions established during this period shaped medieval, Tudor, and industrial Wales.
From Roman roads crossing the valleys to hillforts still occupied beneath new imperial rule, Britons of Cymru explores the transformation of Wales during and after the Roman occupation. Rather than presenting conquest as a simple replacement of one culture by another, the book examines how the peoples of Cymru adapted, resisted, traded, and evolved as Roman systems reshaped the landscape around them.
From shattered Roman frontiers and defended hilltops to warrior courts, mountain strongholds, and kingdoms carved from conflict, Warlords of Cymru explores the turbulent centuries that followed the collapse of Roman Britain. As imperial authority disappeared, new rulers emerged across Wales, competing for land, power, survival, and legitimacy within a fractured and dangerous world.
From remote island monasteries and mountain chapels to holy wells, pilgrim paths, and weathered stone crosses, Saints of Cymru explores the rise of Christianity in early medieval Wales and the sacred landscapes shaped by its saints, communities, and traditions. Blending history, archaeology, folklore, and landscape interpretation, the book traces how faith spread across Cymru after the collapse of Roman Britain.
Although the Romans controlled the lands around Eryri, the mountains themselves remained largely in native hands. After Roman rule ended, local rulers established the Kingdom of Gwynedd, using the rugged landscape as a secure heartland protected by narrow passes and steep valleys. Ancient hillforts such as Dinas Emrys found new purpose as royal strongholds, while early Christian communities founded churches at Llanberis, Nant Peris and Beddgelert. Together, these natural defences, royal centres and religious foundations transformed Eryri from a remote upland into the political and spiritual heart of medieval Gwynedd.
Eryri and the Birth of the Kingdom of Gwynedd
1st July 2026
Romans, Saints and Welsh Kingdoms
11th July 2026
Roman rule introduced gold mining at nearby Dolaucothi and connected the Tywi Valley to the wider empire through forts and roads, while farming communities continued to prosper. After Rome's withdrawal, Dinefwr emerged as the royal centre of Ystrad Tywi and later Deheubarth, as Christianity spread through foundations at Llandeilo, Llangadog and Llandyfeisant. Scattered farmsteads filled the fertile floodplain, linking royal authority with the growing influence of the Church. By the early medieval period, the Tywi Valley had become both the political and religious heartland of southwest Wales.
COMING SOON!
Journal highlighting the most recent research happening in Cymru
Explore dark-age features including llanberis church.
Explore dark-age features including llandeilo church, dolaclothi gold mines and via julia montana
St Davids Cathedral is far more than a medieval cathedral. Its website provides one of the best introductions to the origins of Christianity in Wales, the life of Saint David and the development of the monastery that grew into one of medieval Europe's most important pilgrimage destinations.
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Alongside the history of the cathedral itself, the website explains the traditions surrounding Saint David, the importance of pilgrimage, the early monastic community and the manuscripts that preserve many of the stories from this period. It is an excellent place to begin exploring the religious history of Dark-Age Wales.
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How to investigate early Christianity
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Open the St Davids Cathedral website.
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Begin by reading about Saint David, paying particular attention to:
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his life and traditions;
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the founding of the monastery;
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the growth of pilgrimage to St Davids.
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Explore the history of the cathedral site. Notice how the present medieval building developed from a much earlier religious community founded during the early medieval period.
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Read about pilgrimage and consider why St Davids became one of the most important Christian destinations in western Europe.
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Explore the cathedral's collections and articles relating to manuscripts, early Christianity and the history of the Welsh Church.
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Compare what you have learned with other early religious centres discussed throughout the Dark-Age Cymru Cycle, including Llanilltud Fawr, Llandaff, Llanbadarn Fawr and Clynnog Fawr.
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Understanding the results
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Much of what survives at St Davids today is medieval rather than Dark Age. However, the importance of the site lies in its continuity. The cathedral occupies the location of Saint David's monastery, preserving the history of a religious community that influenced Wales for centuries.
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As you explore the website, try to distinguish between the traditions surrounding Saint David and the archaeological or documentary evidence that survives.
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Together, these different sources provide a fuller understanding of the growth of Christianity in Wales.
The Celtic Inscribed Stones Project, developed by University College London, records the early medieval inscribed stones of western Britain. It is one of the most valuable resources available for investigating the memorial stones, crosses and Ogham inscriptions that survive across Wales.
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Many of these monuments date from the fifth to ninth centuries and preserve the names, languages and beliefs of the people who lived during the centuries following the end of Roman rule.
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How to investigate inscribed stones
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Open the Celtic Inscribed Stones Project website.
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Browse the interactive map or search for a particular county, town or monument.
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Open an individual stone record and examine:
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photographs;
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drawings;
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the original inscription;
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English translation;
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archaeological description;
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references to published research.
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Compare Latin inscriptions with Ogham inscriptions. Notice how the two writing systems were used in different regions and by different communities.
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Read about the archaeological context of each monument. Some survive within churchyards, while others were discovered in fields, cemeteries or reused within later buildings.
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Compare the location of the stone with nearby churches or monasteries using Coflein to understand how these monuments formed part of wider early Christian landscapes.
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Understanding the results
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Inscribed stones are among the earliest written records produced in Wales after the Roman period. They commemorate individuals, preserve personal names and demonstrate the spread of Christianity across western Britain.
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Many inscriptions are short, but they provide important evidence for language, literacy, family relationships and religious belief during the early medieval period.
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When studying an inscription, look beyond the text itself. Consider where the stone originally stood, who commissioned it and what it reveals about the community that created it. Comparing several stones from different parts of Wales often reveals regional differences in language, decoration and religious practice.
While the previous resources focus on early Christianity and inscribed stones, Coflein allows you to explore the wider archaeological landscape of Roman and early medieval Wales.
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Unlike the Ancient Cymru Cycle, where Coflein is particularly useful for finding prehistoric monuments, here it becomes a tool for investigating the churches, monasteries and royal centres that shaped post-Roman Wales. Many of these sites have remained in continuous use for over a thousand years, meaning their earliest history is often preserved beneath later buildings.
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How to investigate Roman and early medieval archaeology
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Open the Coflein website and select Advanced Search.
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Under Period, choose either Roman or Early Medieval.
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Rather than searching for prehistoric monument types, investigate sites such as:
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churches;
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monasteries;
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ecclesiastical enclosures;
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holy wells;
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inscribed stones;
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Roman forts;
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Roman roads;
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royal courts (llys).
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Open the archaeological record and read the description carefully. Much of the earliest evidence survives beneath later churches or settlements and is explained within the written interpretation rather than the photographs.
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Explore the interactive map to identify nearby Roman and early medieval sites. Following Roman roads, river crossings and valleys often reveals how later communities developed within earlier landscapes.
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Compare archaeological records with the information found through the St Davids Cathedral website and the Celtic Inscribed Stones Project. Together, these resources help connect documentary traditions, carved monuments and archaeological evidence.
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Understanding the results
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The Roman and early medieval periods are closely connected. Roman forts were abandoned or reused, new churches were established and kingdoms emerged within landscapes already shaped by centuries of Roman occupation.
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When reading a Coflein record, look for references to:
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Roman occupation;
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post-Roman reuse;
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early Christian foundations;
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ecclesiastical enclosures;
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inscribed stones;
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evidence for successive phases of occupation.
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Rather than studying individual sites in isolation, compare Roman and early medieval monuments within the same area. This helps reveal how Wales evolved from a Roman province into a landscape of churches, monasteries and emerging Welsh kingdoms.
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Coflein is an invaluable resource throughout The Cymru Cycles. Its database records monuments and historic buildings from every period of Welsh history, including prehistoric tombs and hillforts, medieval castles and monasteries, Tudor houses, industrial mines and railways, and even twentieth-century military sites.
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The search techniques introduced in the Ancient and Dark-Age Cymru Cycles can be applied throughout the website. Simply change the Period and Monument Type filters to investigate different chapters of Welsh history. As your knowledge grows, Coflein becomes one of the most powerful tools available for exploring the landscapes, archaeology and built heritage of Wales.