During the pagmo Zhuba Regime era, Gyangze remained outside its rule partly because the Gyangze Prince of Dharma was powerful. Given the fact that Gyangze was on the major thoroughfare from Lhasa to the Xigaze area, and on the road leading to Yadong, it gradually caught the public attention.

The Sagya Prince of U-Tsang. However, areas where the Moinba and Lhoba ethnic groups were concentrated refused to accept this rule and often attacked Sagya officials. One man, Parba Besangbo, managed to calm down the area, and was promoted to be Sagya Nangqen. When he went to China's hinterland, the emperor honored him as a Dasitu official and gave him a seal of authority and an imperial edict. On his way home, he fell in love with the area today known as Gyangze. On the basis of the old palaces of the nobles, he had a new palace built. It was called Gyangkarze. The area where the palace was located was then called Gyangze for short.

The grandson of Parba Besangbo became the Gyangze Prince of Dharma. When he was 25, he initiated the annual Gyangze Grand Summons Ceremony. He managed brought Zong castles and Xika manors in eastern Gyangze under his control, thus expanding his reach to the Dainka Zong, Yangzhog Yumco and Lhoza areas.

When he reached the age of 30, he had a giant silk portrait of Buddha created. According to History of Han and Tibetan, the portrait measures some 30 meters high, with Sakyamuni rising to over 20 meters; the Buddha is flanked by two sages and the Lantern Buddha and Maitreya Buddha; on the four sides are 16 arhats. This was the first of its kind ever created in Tibet.

In 1418, efforts were made to build the Palkor Monastery and the 100,000-Buddha Dagoba (called Palkor Dagoba today). It took more than 10 years to build the two monasteries, witch added luster to Gyangze.