A rare complete gypsum mould, comprising both the upper and lower halves, accompanied by the terra chiara Roman oil lamp produced from the mould, dating to the 3rd–5th century CE. The survival of the complete mould together with its corresponding finished lamp provides an exceptional opportunity to observe the relationship between the mould and the end product. The decorative details of the discus and shoulders are exceptionally well preserved and clearly visible on both the mould and the lamp. The discus of the lamp bears the Christogram, or Chi-Rho (XP), as its central motif. The shoulders are ornamented with concentric-circle motifs, while two floral or clover-shaped motifs are positioned centrally on either side of the lamp. The sharp preservation of the relief decoration in both the mould and the finished lamp provides a particularly clear example of the production technique and decorative motifs of Tunisian terra chiara oil lamps.

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