13th-century piscina/sacrarium located at the eastern end of the south wall of the chancel in Strade Dominican Friary (MA070-067001-), Co. Mayo. Piscina comes from the Latin piscine meaning fish-pond, and is used to a describe a stone bowl with a drain-hole, located in the south wall near the altar of a church for the disposing of water used in the Mass. Other words used to describe this feature included lavacrum, lavatorium or sacrarium, the latter often referring to the drainage hole. The piscina is framed within a chamfered trefoil-headed niche known as the Fenesetlla derived from the Latin word meaning small window or opening. The double bowls, each have a central drainage hole within a six-lobed basin. ‘I will wash my hands clean, and take my place among them at thy altar’ (Psalm 26). See Archaeological of Ireland Description at: https://tinyurl.com/2u942udw