This year's Glanville Lecture in Cambridge was given by Jan Assmann who is an expert on the religion of Ancient Egypt, and to go along with the lecture there was a study day which had 6 speakers (including Assmann) who each told us about a different topic to do with religion in the ancient world. (Well, the Mediterranean/Middle Eastern portion thereof.)
1st Millenium CE
At the end of 2015 the British Museum put on an exhibition about the Celts, looking at both the original culture in its historical context and the way it was later re-imagined. The overall take home message from the exhibition was that the ancient people we now call Celts probably didn't think of themselves as such, and the modern peoples who we call Celts don't necessarily have that much to do with the ancient Celts.