I know that Dean Swift's deathmask is on display in a case in Dublin.

Oliver Cromwell's is currently in an exhibition at the British Museum (August 2003).

There's a fantastic book called Undying Faces, edited by Ernst Benkard and published by Virginia and Leonard Woolf at the Hogarth Press. It contains Napoleon, Beethoven, and a couple of hundred others.

Martin W (15.9.03): - In "The Master of Go" by Yasunari Kawabata the narrator describes photographing the face of the dead Master as if producing a death mask: at the request of the widow, very conscious of the limitations of his equipment.

From T, 22.8.03: I work at the BBC in Cardiff and we have one of the two bronze casts they made of Dylan Thomas when he died. They keep it in reception here. Lovely. I'll send you a pic if you're interested.

Henry H writes (16.1.04):

Dr Johnson's death mask is owned but not displayed by the National Portrait Gallery, and is currently part of an exhibition at his house in Gough Square. There's a James Joyce death mask at the museum in Sandycove, and one of Jeremy Bentham in Edinburgh somewhere. I remember an image of a death mask of Flaubert in Julian Barnes - probably in Something to Declare? Finally, Turner's death mask was apparently stolen from the Royal Academy in the 1980s.