The funerary urns in which the ashes of the cremated were placed were gradually overtaken in popularity by the sarcophagus as inhumation became more common. Particularly in the 2nd–4th centuries, these were often decorated with reliefs that became an important vehicle for Late Roman sculpture. The scenes depicted were drawn from mythology, religious beliefs pertaining to the mysteries, allegories, history, or scenes of hunting or feasting. Many sarcophagi depict Nereids, fantastical sea creatures, and other marine imagery that may allude to the location of the Isles of the Blessed across the sea, with a portrait of the deceased on a seashell. The sarcophagus of a child may show tender representations of family life, Cupids, or children playing.