After the completion of the palace, King Ponhea Yat ordered the construction of a hermitage hut on the top of the mountain near the temple of Wat Phnom, the hermitage of the district chief, which Cambodians today call Neak Ta Preah Chao and Wat Phnom called "Wat Phnom Doun Penh"  "Which marks the name of Grandma "Doun Penh ". After completing the construction of his palace and city, he named the city "Chaktomuk Sakal Kampuchea Thibdey Udiya Mohanakor" in 1416 AD. His reign at Chaktomuk begun the "Chaktomuk Period" of the Kingdom of Kampuchea in 1431.
Upon finishing his palace, King Ponhea Yat built a hermitage on the mountain's peak near Wat Phnom temple, which is now known as Neak Ta Preah Chao and Wat Phnom is called "Wat Phnom Doun Penh", named after Grandma Doun Penh. After completing his city, he named it "Chaktomuk Sakal Kampuchea Thibdey Udiya Mohanakor" in 1416 AD. His reign at Chaktomuk marked the beginning of the "Chaktomuk Period" of the Kingdom of Kampuchea in 1431.