GIANNI MOTTI
"Big Crunch Clock" 1999 

In the run-up to the year 2000, Gianni Motti made and set going the “Big Crunch Clock”, a digital clock with twenty numerals: five billion years calculated to a tenth of a second. The work counts the time separating the sun from its explosion (the “big crunch”) backwards.A bigger one has been installed in the Palais de Tokyo since 1999

And an other project from Gianni Motti. I think we can approve of as monument for artists's assistants. http://www.perrotin.com/Gianni_Motti-works-oeuvres-25129-146.html