The Fanling Tang Chung Ling Ancestral Hall, one of the largest such halls in existence, is today gazetted as an historic building.
The hall, at the foot of Lung Shan, was built in 1525 in honour of Tang Chung-ling, the clan's founding ancestor.
The Tang families in the area are said to be descendants of a princess of the Southern Song Dynasty (1127-1279) married in the hall.
The royal couple's soul tablets are still worshipped in the hall, deemed a monument in 1990.
Today, it is the first structure formally enshrined in law as an historic building under the Antiquities and Monuments Ordinance.
Although repaired and renovated many times over the years, the ancestral hall still remains in much the same form as when it was originally built.