The old palace in Istanbul, also known as the Topkapa Palace, was built in 1459 and completed in 1465. From 1465 to 1853, 26 sultans lived in the Topkapa Palace. In 1853, they moved to the new palace across the Golden Horn. In 1924, they opened as a museum to the public. It covers an area of 700,000 ㎡ and is surrounded by a 5-kilometer-long city wall. Topkapa Palace is located on the high ground behind Sofia Cathedral, on the east side is the Bosphorus Strait, and on the north side is the Golden Horn Bay. The terrain is very conspicuous. From the palace's sea-facing terrace, the beautiful scenery of Golden Horn Bay, the Marmara Sea and the Bosphorus Strait is unobstructed. It became a World Heritage Site in 1985. Beijing's Forbidden City, also known as the Forbidden City, began construction in 1406 and completed in 1420. From 1420 to 1924, 15 Ming Dynasty + 10 Qing Dynasty, a total of 25 emperors stayed in the Forbidden City, and opened as a museum in October 1925. It covers an area of 720,000 ㎡, surrounded by a 12-meter-high palace wall on all sides, and is surrounded by a moat with a length of3.5 kilometers and a surface width of 52 meters. The Forbidden City is located in the center of Beijing. The layout is based on the principle of "Zuozu, Right Society, Facing, and Back City". The building is on the central axis of Beijing City, eight kilometers north and south, straight from the north to the south, and symmetrical from the left. The Forbidden City is in front of the Working People's Cultural Palace (formerly Tai Temple); The park in front of the right is the altar of the emperor's altar to sacrifice the gods of earth and valley. The north of the Forbidden City is the Long Live Mountain (an artificial mountain in Jingshan Park) and the Jinshui River to the south. It became a world cultural heritage in 1987. In a word, the Sultan of the Ottoman Empire, the old palace where the old palace lived was a sea view room with a great location, and the Forbidden City where the emperors of the Ming and Qing Dynasties lived was only a river view room. But the ticket to the old palace actually cost 400 yuan, and the Forbidden City plus the clock and treasure hall was only 80 yuan, five times the price! Too expensive