TL;DR: According to custom books such as Toan Ánh (2001) and Bùi Xuân Mỹ (2001), the Tiền Chủ is the person who first lived in a house and died there. Many families set up a Tiền Chủ altar so the old owner's spirit will not cause trouble, usually a cây hương built in the yard with an incense bowl on top but no memorial tablet because no one knows the name. People make offerings to the Tiền Chủ on the 15th and 1st of the lunar month, on death anniversaries and festivals, or when something bad happens in the house, with offerings similar to those for Thổ Công.
What is the Tiền Chủ?
Toan Ánh (2001) defines it: "The Tiền Chủ is the person who first lived in a house, and later died in that house." The author also notes that although the house may pass through many hands over the years, the Tiền Chủ in the underworld still remembers his old home and occasionally returns to visit[1]. As Bùi Xuân Mỹ (2001) presents it, the Tiền Chủ is also understood as the person who first came to live there and died in that house; the author adds that to avoid being disturbed by the Tiền Chủ's spirit, later owners set up a Tiền Chủ altar[2].
This definition appears in custom books recording Kinh practices, mainly in the Bắc Bộ delta, from the early to the late 20th century. These are descriptive records of custom, not legal texts or modern anthropological research. When reading, one should treat them as accounts of a belief that once circulated, not as verified fact.
Why do people set up a Tiền Chủ altar?
Folk belief holds that the old owner's spirit still remembers the old house and occasionally returns to visit. Bùi Xuân Mỹ (2001) writes: "In the world of the living it is so, but in the underworld, the Tiền Chủ still remembers his house, so he occasionally comes back to visit, seeing that later owners are not really the owners of the house"[2]. Toan Ánh (2001) also records a similar belief[1].
From that belief, the custom books record that the householder sets up a Tiền Chủ altar so the old owner's spirit will not cause trouble. It should be said clearly: this is the voice of folk belief, not a statement about real people or the afterlife. The books recount what people of old believed; they do not assert whether it is true or false.
What does the cây hương in the yard look like?
According to the description by Song Mai and Quỳnh Trang (compilers, 2006), the cây hương consists of a pillar about one meter or more tall; the upper part is built wider, forming an altar surface with a back wall and two side walls, and in the middle of that surface is placed an incense bowl[3]. Bùi Xuân Mỹ (2001) describes the pillar as taller than a person's head, the upper part widened into an altar looking like a throne[2]. Toan Ánh (2001) also says the cây hương is built with a pillar taller than a person, the upper section widened into an altar, shaped like a ỷ or a throne[1].
There is no memorial tablet because no one knows the Tiền Chủ's name. All three books record this point. Toan Ánh (2001) writes: "There is no memorial tablet, because no one knows the Tiền Chủ's name. When making offerings, it is enough to pray to the bản gia Tiền Chủ"[1]. Bùi Xuân Mỹ (2001) also writes: "There is no memorial tablet, because no one knows the Tiền Chủ's name. When making offerings, it is enough to pray to the bản gia Tiền Chủ"[2]. Song Mai and Quỳnh Trang (2006) record the same[3].
The matter of consulting a fortune-teller to learn the Tiền Chủ's name is recounted by Toan Ánh (2001) as follows: some people went to have a hexagram cast and the master told them the Tiền Chủ's full name so they could add it in prayers, but the prayer always states clearly that this is the Tiền Chủ of the house; the author also criticizes fortune-tellers who guess the Tiền Chủ's name and date of death[1]. Bùi Xuân Mỹ (2001) recounts it more briefly: a fortune-teller casting a hexagram may tell the client the Tiền Chủ's full name so they can add it in prayers, but the prayer always states clearly that this is the Tiền Chủ of the house[2]. This is where the books are not entirely consistent about how common the practice of praying the name is, so it is only recounted as each book tells it.
How does the Tiền Chủ altar differ from the Thổ Công altar?
They differ in whom is worshipped and where; the offerings are recorded the same in the books. The table below summarizes exactly what the books say; cells the books do not mention are left blank.
| Criterion | Tiền Chủ | Thổ Công |
|---|---|---|
| Who it is according to the books | The person who first lived in a house and died there[1][2] | The earth god, the deity who watches over the family's land (separate article) |
| Place of worship | A cây hương built in the yard[1][2][3] | Inside the house, on the main altar (separate article) |
| Memorial tablet | None, because no one knows the name[1][2] | Has a memorial tablet (separate article) |
| Offerings | Same as offerings to Thổ Công[2] | (separate article) |
| Occasions for offerings | 15th and 1st of the lunar month, death anniversaries and festivals; when something bad happens in the house[2][3] | (separate article) |
This table compares only in general terms. The Thổ Công section has its own article on the site, and this article does not repeat it.
On which days are offerings made to the Tiền Chủ?
The books record three occasions: the 15th and 1st of the lunar month, death anniversaries and festivals, and when something bad happens in the house. Song Mai and Quỳnh Trang (2006) write: "People make offerings to the Tiền Chủ on the 15th and 1st of the lunar month, on death anniversaries and festivals, or when something bad happens in the house, to pray for peace"[3]. Bùi Xuân Mỹ (2001) writes: "People make offerings to the Tiền Chủ on the 15th and 1st of the lunar month, and on death anniversaries and festivals. The offerings are the same as those for Thổ Công. Sometimes when something is not right in the house, people also make offerings and pray to the Tiền Chủ to pray for peace"[2]. Toan Ánh (2001) does not give separate days for offerings to the Tiền Chủ.
Regarding offerings, Bùi Xuân Mỹ (2001) states clearly that the offerings to the Tiền Chủ are the same as those to Thổ Công[2]. The books do not record a separate offering tray for the Tiền Chủ, so nothing more specific can be said.
How is the Tiền Chủ worshipped in a house without a yard or in an apartment?
The custom books do not discuss the case of a house without a yard or an apartment. Toan Ánh (2001), Bùi Xuân Mỹ (2001), and Song Mai and Quỳnh Trang (2006) all describe the Tiền Chủ altar as attached to a cây hương in the yard, in the context of houses in the Bắc Bộ delta in the 20th century[1][2][3]. No passage discusses adapting this custom for townhouses without a yard or apartments. Therefore, this article does not offer guidance for those cases.
Does buying an old house mean one must worship the Tiền Chủ?
According to Toan Ánh's (2001) account, the Tiền Chủ altar is set up by the householder when they do not want the Tiền Chủ's spirit to cause trouble[1]. In other words, according to the books, worshipping the Tiền Chủ is a custom of some families, not a mandatory duty. Bùi Xuân Mỹ (2001) also writes in that direction[2]. Both present it as a solution of folk belief, not as a mandatory rule for every household. Today's readers may see it as a custom that once existed, depending on each family's circumstances and beliefs.
One point to distinguish: the outdoor cây hương is also used to worship the Sơn Thần, the Hổ deity, and the Mộc Tinh. Those are different deities; see Thần Hổ, Sơn thần, Mộc tinh: the deities Vietnamese people once worshipped at outdoor incense trees. This article discusses only the cây hương for worshipping the Tiền Chủ.
Origin and limits of the sources
The three books cited here are all popular custom books, published in Hà Nội in 2001 and 2006[1][2][3]. They record Kinh practices in the Bắc Bộ delta and do not represent the whole country or other ethnic groups. The books also repeat many passages from one another, so each should not be considered an independent source verifying the others. The date when the Tiền Chủ worship custom arose is not determined by these books; no stele inscription or village convention is cited to prove when the custom began. Therefore, the article does not provide a timeline for the custom's origin.
For further reference, see the articles on Thổ Công, Thổ Địa, and the article on the number of altars and incense bowls in the house. The rituals and prayer texts for the Tiền Chủ are presented on the site's separate ritual page.
