During the reign of Khải Định (1916 - 1925), much of Vietnam's sovereignty fell into the hands of the French colonizers, and Western culture strongly influenced our country. Particularly in 1922, King Khải Định embarked on a journey to Europe, leading to the incorporation of modern architectural elements and construction techniques into many new or renovated architectural works during his reign. Instead of relying primarily on traditional local building materials such as wood, stone, brick, and lime mortar, King Khải Định preferred durable materials like cement, steel, porcelain, and glass. In his mausoleums and palaces, modern amenities and techniques such as electric lights, running water, water fountains, lightning rods, and iron gates were employed.
After the passing of King Khải Định, King Bảo Đại undertook the renovation of the palace, incorporating additional Western amenities. Thus, the Kien Trung Palace became the shared residence of the entire royal family, including King Bảo Đại, Queen Nam Phương, Prince Bảo Long, Princesses Phương Mai, Phương Liên, Phương Dung, and Prince Bảo Thăng.
On August 29, 1945, the Kien Trung Palace witnessed a significant historical event: King Bảo Đại's first contact with the provisional government delegation to formally discuss abdication and transfer of governing authority to the provisional government.
By 1947, the Kien Trung Palace had completely collapsed, leaving only its foundation.
On February 16, 2019, Hue Monuments Conservation Center commenced the restoration and revitalization project of the Kien Trung Palace. The project covered an area of over 3,800 square meters. The construction units preserved the existing foundation structure and minimized intervention in the original features of the heritage site.
The project included reinforcement, restoration of perimeter walls, railing systems, courtyard areas comprising forecourt and rear court, as well as various levels; restoration of the Kien Trung Palace (Kien Trung Pavilion) with 2 floors, approximately 14 meters in height, and a construction area of about 975 square meters. Additionally, the project renovated small structures such as brick platforms, fountain pedestals, artillery platforms, guardhouses, and greenery systems, and preserved the foundation of the Dong Cung Pavilion, Imperial Archive Room, Military Hall, and the Imperial Reading Room. The project had a total investment of over 123 billion VND from the cultural development program funds and other legally mobilized sources.
5 years after the commencement of restoration and revitalization, the Kien Trung Palace heritage site has been completed and officially opened to the public, introducing it to the people and tourists during the 2024 Lunar New Year.