This is a just-released time-lapse of Michael Lee-Chin's Crystal addition to the Royal Ontario Museum (ROM). The period covered is from May 2003 to opening night in November 2007, through a series of still images captured daily at 1 pm during construction and at 10-minute intervals throughout opening week.
I have to admit that the ROM has become one of my favourite spots in the city, even though it was a pain/thorn during the construction process.

http://www.rom.on.ca/crystal/index.php