The Shrine of St Patrick's Tooth (Irish: Fiacail Phádraig, translated as Patrick's Tooth) is a medieval reliquary traditionally believed to contain a tooth belonging to Patrick, Ireland's patron saint, who lived in the 5th century. The shrine comprises a wooden case lined with bronze and decorated with gold, silver and amber fittings, and was built in two phases. It's basic structure and the central ringed crosses on either side are 12th century, while the purse-shaped form and most of the metal work, including the saints, were added in the 1370s when the object was substantially refurbished.