Encore Wednesday, Dec. 29, 2021 at 9 p.m. on KPBS TV + Sunday, Jan. 2. 2022 at 9 p.m. on KPBS 2 / On Demand. The Forbidden City is the world’s biggest and most extravagant palace complex ever built. How did the Ming Emperor’s workforce construct its sprawling array of nearly 1,000 buildings and dozens of temples in a little over a decade?