The journal has included "much valuable material on the manuscripts, genealogy, heraldry, toponymy, folklore and literature of Wales".

[2][3][4] "The journal covers a broad range of multi-disciplinary topics relating to the archaeology and history of Wales and the Marches.

Occasionally, and particularly in the earlier years, articles have been published on the archaeology of other Celtic lands (Brittany, Cornwall, the Isle of Man, Scotland and Ireland).

In the 19th century, articles tended to concentrate on prehistoric monuments (particularly cromlechs, chambered tombs and hill-forts), Roman sites, inscribed stones and other discoveries of the Early Middle Ages, and the architecture of medieval Wales, especially of churches, castles, and monasteries.

The journal has also carried more synoptic articles treating particular topics in greater depth; for example, the 2005 themed issue largely devoted to the Cistercians.