I just realised - it's ten years since Shibboleth was in the Turbine Hall at Tate Modern.
Crumbs. That makes me feel old.
I was working in the office block next door at the time and I used to regularly go in there during my lunch break. I remember the day it opened, I went in there not knowing anything about the work, just that the new Turbine Hall installation was opening that day, and at first I thought I'd made a mistake - it looked totally empty. Then I noticed people looking at the floor...
I know what you mean about it being profoundly affecting.
Ai Weiwei's Sunflower Seeds and Olafur Eliasson's Weather Project were both similarly moving in their own ways. They've had some good stuff in the Turbine Hall over the years.