Northern Nigerian terracotta horizon (regional attribution concept)
A broad archaeological grouping covering Iron Age fired-clay figurative traditions across northern Nigeria, of which Nok, Yelwa, and Katsina-Sokoto wares are constituent members.
The northern Nigerian terracotta horizon is an interpretive framework used by archaeologists and art historians to describe the cluster of Iron Age ceramic and figurative traditions distributed across northern and central Nigeria, sharing common technological features — coil-built or modelled forms fired at relatively low temperatures, use of locally available clays tempered with grit or organic material — while differing in style, chronology, and geographic extent. Nok is the best-documented member, with a working date range of c. 500 BC to AD 200 and a substantial stylistic corpus; Yelwa, Katsina, and Sokoto-region wares belong to later phases of the same broad tradition and are far less systematically studied.
The concept matters for collectors because it underlines why confident single-site attribution is frequently impossible: a terracotta produced anywhere across this large region may share surface and fabric characteristics with material from several sites. Attribution to "Yelwa" rather than "northern Nigerian Iron Age" therefore implies a specificity that the current state of archaeological knowledge rarely supports. Responsible catalogue practice and auction-house attribution should reflect this uncertainty rather than asserting site-level provenance without excavation documentation.