Vien Ngoai Temple (Temple of Duc Thanh Ba)

Vien Ngoai Temple has a structure in the shape of the character Nhi, consisting of the Dai Bai (main worship hall) and Hau Cung (rear sanctuary), and has undergone many renovations and repairs.

At present, the Dai Bai has 5 bays with closed gable walls. From the top of the Day River dike, descending 7 steps built with brick-concrete is the Dai Bai platform; to avoid the effects of rain and wind, this stair section is made with a concrete ceiling supported by pillars, with a decorative wall outside forming a nghi mon (ceremonial gate). The bodies of the pillars are inscribed with couplets, and the walls on both sides of the nghi mon are decorated with vivid reliefs of worshipping elephants. The roof trusses are made in the keo ke gia chieng style on a crossbeam resting on two rows of front and rear columns.

From the Dai Bai platform, across a 1.5m-wide courtyard, is the Hau Cung. The Hau Cung has 3 bays with closed gable walls and is built high. The rear roof is extended; the front roof is made in two tiers (chong diem); the four roof trusses of the Hau Cung are made in the keo ke qua giang style resting on columns built against the wall, supporting two upper roofs. In front, in the central bay, a large door with four folding door panels opens; the two side bays have two open doors, lower than the central one. Above the two side doors are two reliefs with themes of the four sacred creatures and ngu long hi thuy (fish-dragon playing in water). In the central bay of the Hau Cung is a worship niche, above which are the dragon throne and the memorial tablet of Duc Giac Hai Dai Vuong. The right bay is where the dragon throne and memorial tablet of Duc Thien Bong Thuy Muc are placed. The left bay is designed as an iron niche, where the temple's rare artifacts of various materials are kept.

The temple also preserves a number of artifacts, including: a copy of "Hung Due Vuong Trieu Nhat Vi Thien Than Giang The Ngoc Pha" made in the 2nd year of Vinh Huu (1736); eleven edicts issued by various dynasties conferring titles on the Saints, the earliest in the 3rd year of Duong Duc (1674); three horizontal lacquered boards, notably "Dinh tien dang ngan" (meaning: First pulled ashore), related to the worship of Duc Giac Hai Dai Vuong...

Every year, the people of Vien Ngoai Village organize a festival to commemorate the birth and death days of the Saint in the third lunar month.

Vien Ngoai Temple was recognized by the Minister of Culture and Information as a national artistic relic under Decision No. 52/2001/QD-BVHTT dated December 28, 2001.