In Greek mythology, Agelasta (Greek, Ancient (to 1453);: Ἀγέλαστος or Greek, Modern (1453-);: Αγέλαστη meaning "smile-less") was the name of the stone on which Demeter rested during her search for Persephone.[1]
In modern culture, Agelasta inspired the title of a documentary by Philippos Koutsaftis (Φίλιππος Κουτσαφτής), called Agelastos Petra - Αγέλαστος Πέτρα "smile-less stone" (2000) on Modern Eleusis.