Russia's cultural hub and former imperial capital, St. Petersburg, officially opens the doors of its sumptuous new Mariinsky II Theater on May 2. The $700 million project has variously drawn jeers and cheers. But there's little disagreement on three points -- it's another feather in the cap of a city already rich with cultural landmarks, its ample space and state-of-the-art technology mark a new chapter for the Mariinsky complex, and it could hardly be a greater architectural departure from the original Mariinsky Theater that rounds out the complex. (15 PHOTOS)