An Hai village predecessor and Thoai Ngoc Hau worshiping house is located at 15 Ha Thi Than Street, An Hai Tay Ward, Son Tra District. This is the place to worship the forefathers of An Hai village and the famous man Thoai Ngoc Hau.

In the second half of the 15th century, many villages and communes on the right bank of the Han River were in turn formed by the exploration of the "Southward" migrants, including An Hai village. Legend has it that the people who first gathered inhabitants and exploited this land were Mrs. Ha Thi Than and her husband, Mr. Cong Than. After they passed away, people called the whole large land along the east bank of Han River “Ba Than land” to acknowledge their merits. An Hai villagers also honored them as the pioneers of farming and built them a worshiping temple. Since then, An Hai village predecessor worshiping house was born. Later, this is also a place to honor a famous historical figure of the Nguyen Dynasty - a son of An Hai village, Thoai Ngoc Hau (Nguyen Van Thoai).

Nguyen Van Thoai was born in Tan Ty (1761), in An Hai village, An Luu Ha canton, Dien Phuoc town, Dien Ban district, Quang Nam province. His parents were Army Officer Nguyen Van Luong and Mrs. Thuc Nhan Nguyen Thi Tuyet. Because his homeland was in turmoil, Nguyen Van Thoai had to follow his parents to live at Cu Lao Dai on Co Chien River (Vinh Long province) and volunteered to serve Nguyen Phuc Anh (King Gia Long) when he was 16 years old. It can be said that his whole life, from entering the military career to leaving the world (1829) was a record of achievements for posterity.

History has recorded him as an exemplary mandarin with a strategic vision and a perfect General in both knowledge and power who was respected by King Gia Long. He was awarded and promoted many times, in which the highest position was Marshal of Chau Doc station cum Ha Tien military Head (which included protecting of Cambodia), equivalent to the rank of chief second grade in martial arts.

For his hometown An Hai, Thoai Ngoc Hau was also a man of merits. He himself surveyed and directed the establishment of Ba Than market (now Ha Than market) and helped villagers to rebuild pagodas, communal houses and temples, including the pre-sage worshiping house of An Hai village. In order to commemorate his merits, the people of An Hai village honored and worshiped Thoai Ngoc Hau as the post-sage of the village.

It is said that the An Hai village predecessor and Thoai Ngoc Hau worshiping house was first built around the beginning of sixteenth century with thatches and bamboos. In 1827, during a visit to his homeland, Thoai Ngoc Hau donated money to rebuild the worshiping house with precious woods in the traditional architecture of the Ruong house of Quang land. Since then, the house has been renovated many times. In 2009, this place was restored by Da Nang People's Committee with a budget of 10.8 billion dong.

Currently, the worshiping house of An Hai Village predecessors and Thoai Ngoc Hau has an area of ​​4,250 m2, facing the south, including the following works: worshiping house; memorial stele house; Tru house; 04 graves of the pre-sages including Mrs. Than, her husband and her parents; and the wind tomb of the famous general Tran Quang Dieu.

An Hai village predecessor and Thoai Ngoc Hau worshiping house was recognized as a national historic relic in Decision No. 06/2007/BVHTTDL dated August 27, 2007 of the Ministry of Culture, Sports and Tourism.

Every year, at the relic, on the 2nd day of the 3rd lunar month, An Hai villagers hold the pre-sage worshiping ceremony and on the 6th day of the 6th lunar month, they hold post-sage and Thoai Ngoc Hau worshiping ceremony.

Nearby monuments and attractions:

- Tu Chanh Van Nam Hai Whale shrine (Fishery shrine), Tran Hung Dao street, An Hai Tay ward, Son Tra district (230m to the Northwest)

- An Hai communal house, Tran Hung Dao street, An Hai Tay ward, Son Tra district (1.2 km to the North)