Mary's favourite piece was the silver Gundestrup cauldron and I agree it is absolutely spectacular - and so cleverly displayed - in the round, so that you can see all of the carved images, inside and out.
(photograph of the cauldron in Berne by Rosemania - Wiki commons)
But what most caught my imagination was the carnyx - the Celtic horn. You can see three of them being played on a detail from the cauldron -
(photograph by Bloodofox - Wiki commons)
Let me know what you think - and if you are within striking distance of Edinburgh, do go to the exhibition. It's on until the 25th September and you can get all the details here.
Joan Lennon's website.
Joan Lennon's blog.