turned 80 this last February. ETH Zürich organised a Niklaus Wirth Birthday Symposium
to celebrate this. All the talks are available online if anyone's interested. I have to admit that I only skimmed over some of them so I can't say much about how interesting they really are. I watched Wirth's own talk though where he talks about his past career mainly, which really is a look back into the history of personal computing (well, a tiny part of it anyway).