The Forbidden Purple City found in Hue, Vietnam is more than just a tourist attraction, its living history. Built for the Nguyen Dynasty, the entire city is surrounded by a 10km moat and 10 gates. The city is laid out so that there is a citadel within a citadel within a citadel. The first citadel of the city was populated by non-royal commoners. The next was built for important ceremonies. The final citadel is where the Purple Forbidden City was located. Besides royalty, the only ones allowed in this inner sanctum were eunuchs who served the family and the emperor’s concubines.