The Putuo Zongcheng Temple was built between 1767 and 1771 for a specific occasion: the celebration of Emperor Qianlong's birthday. But a birthday party does not require 220,000 square meters of temple. Qianlong had something grander in mind. He wanted a Buddhist complex in Hebei Province that rivaled the Potala Palace in Lhasa, the residence of the Dalai Lama. The result is a deliberate fusion of Chinese and Tibetan architectural styles -- terraced red walls rising in the Tibetan manner, crowned with halls and pavilions adorned with copper and gold tiled roofs in the Chinese tradition. The temple is one of the Eight Outer Temples of Chengde, a collection of religious complexes surrounding the Chengde Mountain Resort, the imperial summer retreat. These temples were administered by the Lifan Yuan, the Qing department responsible for the affairs of Mongolian and Tibetan minorities, and each one blends architectural traditions to project a message of multicultural unity under imperial rule.

The Putuo Zongcheng Temple served purposes far beyond Buddhist ceremonies. It was a stage for statecraft. Here, Qianlong gathered envoys from the empire's diverse ethnic communities -- Mongolians, Tibetans, and others -- hosting meetings away from the formality of Beijing's Forbidden City. The nearby Chengde Mountain Resort provided hunting grounds where the emperor could entertain guests in a more relaxed atmosphere, building personal bonds with the leaders of far-flung territories. The temple's sheer scale was itself a diplomatic statement: the Qing court could match anything that Lhasa had to offer, and the emperor's hospitality extended not just to Chinese traditions but embraced Tibetan Buddhism as well. Walking through the complex today, you pass through the Qianlong Tablet Pavilion, the Five Pagodas Gate with its multi-colored glazed tiles, and finally reach the massive Wanfaguiyi Hall at the center, its golden rooftop gleaming against the surrounding hills.

The Sino-Swedish expedition of 1930 brought Hedin, ethnographer Gosta Montell, Georg Soderbom, and Chinese architect Liang Weihua to the Putuo Zongcheng Temple on a singular mission. They meticulously documented the golden temple hall, then oversaw the construction of a full-scale 1:1 replica at Liang's workshops in Beijing. Two additional models at 1:10 scale were also produced. The full-size replica crossed the ocean to be erected at Chicago's Century of Progress exposition in 1933, where visitors could experience a Tibetan-style Buddhist hall without leaving Illinois. One of the smaller models went to Chicago as well, serving as a construction guide. The other traveled to the Museum of Ethnography in Stockholm, where it remains today -- a Swedish souvenir of Qing imperial ambition, itself built as a Chinese echo of Tibetan sacred architecture.

In 1994, the Putuo Zongcheng Temple was inscribed as a UNESCO World Heritage Site alongside the Chengde Mountain Resort and the other Outer Temples. The recognition was overdue. Among the largest temple complexes in all of China, it anchors a landscape that tells the story of how the Qing dynasty governed an empire of staggering diversity. The cylindrical towers, the doubled-layered pavilions, the corner buildings of the Wanfaguiyi Hall -- each element carries meaning from both Chinese and Tibetan architectural vocabularies. Today the temple draws visitors who climb its terraces for views across the wooded hills of northern Hebei, where the mountains begin their rise toward the Mongolian plateau. The golden rooftop that Qianlong commissioned still shines, a reminder that the most enduring diplomatic gestures are sometimes made not in words but in stone, copper, and gold.