Ah, thank you. I'm remembering the urn now, that Agrippina carried.
Not to go too far off topic, but I wonder whether the Roman Catholic veneration of saints in the form of wax effigies on public display might be yet another carryover from Roman practice? In Manhattan there's a church up near Fort Tryon Park, and its altar is actually a clear glass sarcophagus publicly displaying the remains of the Roman Catholic saint known as Mother Cabrini. They say it's actually her "incorruptible" dead body that's been lying there intact since the 1930s, as saints aren't supposed to decay after death. I've seen her and, while the love of the macabre in me quite likes the idea of a nearly 80-year-old corpse adorning a church, I find I must, disappointedly, go with the wax effigy theory.
-- Nephele