The Dome, the largest single-roofed structure in the world, was built to hold a year-long exhibition to celebrate the beginning of the third millennium.

BBC: The interior of The O2 arena

Then this November, Diller proposed splitting IAC into five parts that would use a single-tiered voting structure, thus reducing Liberty Media's hold on the company by almost half to 30%.

FORBES: Diller Won't Go Quietly From IAC