Climbing the stone steps to the summit of Mount An Phụ, visitors stand at an elevation of roughly two hundred and forty-six meters, where winds sweep from all four directions and the plains below meet low limestone ridges running toward the Kinh Thầy River. On that peak stand two neighboring roofs, a temple dedicated to Prince An Sinh Trần Liễu and Tường Vân Pagoda about thirty meters away. In front of the pagoda lie two perennial wells known locally as the Dragon Eye Well (giếng Mắt Rồng) and the Jade Well (giếng Ngọc).
Yet Đền Cao is only one cluster. Not far away inside the limestone massif of Dương Nham lies Kính Chủ Cave, where generations carved inscriptions directly into the rock wall. Further still, in Nhị Chiểu Ward, stands Nhẫm Dương Pagoda. Together these three clusters form a single heritage dossier, and the third holds the deepest sectarian weight as the ancestral seat of the Tào Động (Caodong) Zen lineage in Vietnam.
IThree heritage clusters and the Tào Động ancestral seat
Understanding this complex requires reading it in three parts, because the three clusters neither share the same layer of veneration nor follow the same architectural form. The first cluster comprises Đền Cao on Mount An Phụ and the adjacent Tường Vân Pagoda, one venerating a historical figure of the Trần dynasty and the other venerating the Buddha alongside the Three Teachings. The second is Kính Chủ Cave inside Mount Dương Nham, serving simultaneously as a cave pagoda and an archive of stone inscriptions. The third is Nhẫm Dương Pagoda in Nhị Chiểu Ward, whose Sino-Vietnamese name is Thánh Quang tự (Sacred Light Temple), the ancestral seat of a Zen school.
The Chinese characters displayed at the top of this page belong to Nhẫm Dương Pagoda, as the three-part complex has no single shared Sino-Vietnamese name. Đền Cao bears its own classical title, An Phụ sơn từ, meaning the shrine on Mount An Phụ.
Đền Cao venerates Prince An Sinh Trần Liễu, born in 1211, the elder brother of Emperor Trần Thái Tông and the father of Grand Commander Hưng Đạo Đại Vương Trần Quốc Tuấn. In 1237, the royal court granted him the estates of An Phụ, An Dưỡng, An Sinh, An Hưng, and An Bang as his fiefdom and conferred upon him the title Prince An Sinh (An Sinh Vương) to guard the northeast frontier and oversee the ancestral tombs and rites of the Trần clan. He passed away on the first day of the fourth lunar month in 1251 at the age of forty, was posthumously honored by Emperor Trần Thái Tông as Khâm Minh Đại Vương, and was enshrined right above his burial mound on the summit of Mount An Phụ. Inside the rear sanctuary, flanking his statue, stand altars to the First Royal Princess (Đệ Nhất Vương Cô) and Second Royal Princess (Đệ Nhị Vương Cô), two daughters of Hưng Đạo Đại Vương.
Tường Vân Pagoda, popularly called Chùa Cao (High Pagoda) by local residents, stands about thirty meters from the temple. Records from the Department of Cultural Heritage note that the pagoda venerates the Buddha and the King-Monk Trần Nhân Tông, while accounts in Nhân Dân Newspaper describe its altars arranged according to the Three Teachings in One Origin (Tam giáo đồng nguyên), featuring statues of the Buddha, Confucian Sages (Đức Thánh Hiền), and the Jade Emperor (Ngọc Hoàng Thượng Đế), with a shrine to the Four Palaces Mother Goddesses (đền thờ Mẫu Tứ Phủ) to its left.
Kính Chủ Cave presents yet another configuration. Inside the cavern stand an altar to the Buddha alongside altars to Emperor Lý Thần Tông, Zen Master Minh Không, Patriarch Huyền Quang, and the Trần court scholar-official Phạm Sư Mạnh. A single cavern housing the Buddha, an emperor, Zen masters, and a mandarin illustrates the syncretic worship characteristic of northern Vietnam's karst cave shrines.
Ancestral seat of the Tào Động Zen lineage in Vietnam
Tào Động (Caodong) is one of the Five Houses of Chinese Chan Buddhism formed during the Tang dynasty, taking its name from its two founding masters, Dongshan Liangjie (Động Sơn Lương Giới) and his dharma heir Caoshan Benji (Tào Sơn Bản Tịch). The lineage is renowned for the doctrine of the Five Ranks of Lord and Vassal (ngũ vị quân thần), a fivefold dialectic examining the relationship between ultimate reality and phenomenal appearance through the metaphor of monarch and minister, showing that essence and function are inseparable. Its contemplative method emphasizes silent illumination (lặng lẽ mà soi), sitting in meditation until the mind settles so that innate clarity manifests naturally, in contrast to the public-case (kōan) and shouting methods associated with the Lâm Tế (Linji) school. Both belong to Zen Buddhism, differing only in the skilful means used to guide practitioners through the gate.
The master who brought this lineage to Vietnam was Zen Master Thủy Nguyệt, dharma title Thông Giác Đạo Nam, born Đặng Giáp in 1637 in Thanh Triều Village. Ordained at an early age, he traveled north in 1664 with his disciples in search of a teacher, reaching Mount Phoenix (Phượng Hoàng) in Huzhou, where he received dharma transmission from Zen Master Yiju Zhijiao (Nhất Cú Trí Giáo), recorded as the thirty-fifth patriarch of the Tào Động lineage. Becoming the thirty-sixth patriarch, he returned to Vietnam in 1667, propagated the school across Tonkin (Đàng Ngoài), and chose the Nhẫm Dương mountain range as his seat of practice.
He passed into parinirvāṇa inside a mountain cave at Nhẫm Dương in 1704 at the age of sixty-eight, and the cavern has since been known as Thánh Hóa Cave (Cave of Sacred Transformation). His dharma heir was Zen Master Tông Diễn, titled Chân Dung, and from these first two generations the Vietnamese Tào Động lineage spread to major northern ancestral temples such as Hòe Nhai Pagoda in Hanoi. Regarding the exact lunar date of his passing, most temple records state the sixth day of the third lunar month, though certain monastic genealogies record the sixth day of the sixth lunar month, so the library records both.
The most common misconception at this site concerns the figure venerated inside Đền Cao. On the mountain slope about three hundred meters in front of the temple stands a monumental statue of Hưng Đạo Đại Vương measuring 12.7 meters high and assembled from sixty-five blue-stone blocks, whose foundation stone was laid in 1993 and which was inaugurated on 8 October 1998, accompanied by a forty-five-meter terracotta relief composed of five hundred and twenty-six tiles according to Mekong ASEAN Magazine, or two hundred and sixty-five tiles according to Nhân Dân Newspaper. Because the monument is so prominent, many visitors assume the temple on the peak also venerates Hưng Đạo Đại Vương. It does not. Đền Cao venerates Prince An Sinh Trần Liễu, his father, whereas the monument on the lower ridge was erected in modern times to honor the son.
IIChronology of the three clusters
The three clusters do not share a single founding date. The clearest way to trace them is by historical layer, beginning with the Trần dynasty layer at Đền Cao and Nhẫm Dương Pagoda, followed by the Trần and Lê cliff inscriptions at Kính Chủ Cave, and finally the seventeenth-century layer when Nhẫm Dương became the ancestral seat of the Tào Động school.
- 1251Passing of Prince An Sinh Trần LiễuHe passed away on the first day of the fourth lunar month at the age of forty. The temple on the summit of Mount An Phụ was erected during the Trần dynasty right over his tomb to venerate him, marking the origin of the first cluster.
- 13th centuryFounding of Nhẫm Dương PagodaTemple records and Buddhist studies state that Nhẫm Dương Pagoda, titled Thánh Quang tự, was founded under the Trần dynasty and served as a center of the Trúc Lâm Zen school. Tường Vân Pagoda on Mount An Phụ also belongs to this period.
- 1368Earliest cliff stele at Kính Chủ CaveThe two earliest inscriptions in the cave were carved in the eleventh year of the Đại Trị reign (1368) by Grand Councilor Phạm Sư Mạnh, a Trần dynasty mandarin and poet. From then on, carving inscriptions into the cave walls became a tradition spanning centuries.
- 1487Bestowal of the title Sixth Grotto under the Southern SkyIn the eighth lunar month of the eighteenth year of the Hồng Đức reign (1487), Emperor Lê Thánh Tông visited the cavern, composed poetry carved into the rock face, and bestowed the title Nam Thiên đệ lục động (Sixth Grotto under the Southern Sky).
- 1667Arrival of the Tào Động lineage at Nhẫm DươngAfter traveling north in 1664 to seek the Dharma, Zen Master Thủy Nguyệt Thông Giác returned to Vietnam in 1667, introducing the Tào Động lineage to Northern Vietnam and establishing Mount Nhẫm Dương as his center of teaching.
- 1704Parinirvāṇa of Patriarch Thủy NguyệtThe patriarch passed away in seated meditation inside a mountain cave at Nhẫm Dương (recorded as the sixth day of the third or sixth lunar month). The cavern was named Thánh Hóa Cave, and Nhẫm Dương Pagoda became the ancestral seat of the lineage.
- 2016Special national heritage siteDecision No. 2499/QĐ-TTg dated 22 December 2016 designated the complex a Special National Heritage Site. The certificate reception ceremony was held on 10 December 2017.
- 2017 - 2025National treasure and UNESCO World HeritageThe forty-seven cliff steles at Kính Chủ Cave were recognized as a National Treasure in 2017. On 12 July 2025, Kính Chủ Cave and Nhẫm Dương Pagoda were inscribed by UNESCO as component sites of the Yên Tử, Vĩnh Nghiêm, Côn Sơn, Kiếp Bạc World Cultural Heritage Complex.
Another chronological layer here belongs not to written history but to archaeology. Surveys of the cave system around Nhẫm Dương Pagoda since 2000 led by Professor Nguyễn Lân Cường and the Institute of Archaeology have yielded fossilized bones and teeth of prehistoric humans and twenty-seven ancient animal species such as Pongo orangutans, elephants, and rhinoceroses, with Thánh Hóa Cave containing the highest concentration. Because specific dates across sources range from roughly thirty thousand to fifty thousand years before present, the library records that full range rather than selecting a single figure. Beyond fossils, the pagoda preserves stone axes, Đông Sơn bronze spears, and more than seven hundred ancient coins from four countries.
IIIMountains, caves, and temple halls
What sets this complex apart from lowland monuments is stone. Each cluster engages the limestone in its own manner, as the first builds halls atop a rocky peak, the second places its altars inside a hollowed cavern, and the third nestles its monastery at the foot of the cliffs while keeping the mountain cave as a sacred sanctuary.
Built on the highest peak of the An Phụ range in a front-hall and rear-T-shaped layout (tiền nhất hậu đinh), comprising a five-bay two-tier eight-roof front ceremonial hall with curved tiles, a three-bay two-wing middle hall, and a rear sanctuary. Restored between 2005 and 2007.
Venerating the Buddha, King-Monk Trần Nhân Tông, and the Three Teachings, standing about thirty meters from the temple with a Four Palaces Mother Goddess shrine on its left. In front lie the Dragon Eye Well and Jade Well, two summit rock wells that never run dry.
A large vaulted cavern inside Mount Dương Nham at an elevation of nearly forty meters. Housing both Dương Nham Pagoda and cliff inscriptions, the rock face serves simultaneously as the wall of a temple and the surface of a stele.
Forty-seven surviving inscriptions carved directly into the limestone walls and ceiling, comprising thirty-nine in Chinese, seven in Romanized Vietnamese (Quốc ngữ), and one bilingual inscription, dating from 1368 to the early 20th century. Recognized as a National Treasure.
Titled Thánh Quang tự, nestled in a limestone valley in Nhị Chiểu Ward. Serving as the ancestral seat of the Tào Động lineage, its grounds preserve a five-story Lê dynasty stone stupa enshrining the relics of National Master Thủy Nguyệt.
A limestone cave roughly one hundred meters long behind Nhẫm Dương Pagoda where Patriarch Thủy Nguyệt attained parinirvāṇa. It also yielded the richest deposit of prehistoric human and animal fossils in the area, uniting sacred memory with archaeology.
The Sino-Vietnamese term ma nhai literally means polishing a cliff face and engraving characters directly onto the prepared stone. Inscriptions of this kind cannot be moved or re-erected elsewhere. Consequently, a wall of inscriptions spanning seven centuries like that at Kính Chủ is an extraordinary historical archive because every text remains on the exact spot chosen by its author, with newer inscriptions squeezed between older ones.
A frequent confusion arises because the entire complex is referred to by a single combined title, leading first-time visitors to imagine one contiguous compound. In reality, the three clusters lie kilometers apart across two wards, and each maintains its own liturgical calendar. The heritage dossier groups them together for the shared geological and historical value of the Kinh Môn limestone range, not because they share a single enclosure.
IVThe lie of the land and orientation
This section presents the library's reading through the lens of traditional feng shui, not statements recorded in stele inscriptions or official heritage dossiers. The library notes this explicitly so readers can distinguish between historical documentation and geomantic interpretation.
First is the mountain formation. The entire area consists of a low limestone range rising out of the alluvial plain, encircled by the Kinh Thầy River and its distributaries. In traditional land-viewing, a flat delta lacks backing support, so a spine of stone emerging from the fields is regarded as the skeletal bone (cốt) of the region. Past generations sited all three sacred clusters directly along this stone spine.
Second is the stance of Đền Cao. The temple sits on the highest peak, open on all four sides with no higher summit to shelter it. In classical geomancy this is a posture of solitary majesty (độc tôn), fitting for a shrine to a royal prince, yet it is also an exposed position receiving the full force of wind and sun without cover, which is why the temple was built low with heavy roofs and thick walls. The two wells on the summit serve as points of water gathering (thủy tụ) atop a peak dominated by Metal and Earth, and perennial water at high elevation is read in traditional lore as an auspicious sign of the land.
Third is the interior of Kính Chủ Cave. A cavern inside a stone mountain is viewed in classical geomancy as a natural node (huyệt), with the mountain peak forming the rear pillow, the side walls acting as the Azure Dragon on the left, White Tiger on the right, and the cave mouth opening into the bright hall (minh đường). Because the landform is complete without erecting timber halls, large caves were often chosen as Buddhist sanctuaries even earlier than freestanding temples.
Fourth is the Nhẫm Dương valley. The pagoda sits enclosed by surrounding limestone peaks with only a single opening. Traditional geomancy calls such an enclosed basin sheltering from wind and gathering qi (tàng phong tụ khí), the exact setting sought by contemplative practitioners because enclosure brings stillness, caves allow solitary retreat, and subterranean mountain springs sustain long residence. Still, temple records contain no mention of geomantic formulas in the founding of the site, so this reading remains a comparative observation rather than a historical conclusion.
VFestivals and patriarchal memorial days
The three clusters observe three distinct ritual calendars, a natural outcome of their different layers of veneration. Đền Cao centers its annual cycle on the death anniversary of Prince An Sinh, whereas Nhẫm Dương Pagoda centers on the memorial day of its founding patriarch. Universal Buddhist feast days are observed at both pagodas.
| Lunar date | Site | Observance |
|---|---|---|
| 1st day of the 4th month | Đền Cao An Phụ | Death anniversary of Prince An Sinh Trần Liễu, the principal annual festival of the temple, featuring ceremonial rites and incense offerings by surrounding villages. |
| Three spring months | Đền Cao and Tường Vân Pagoda | Extended spring pilgrimage season during which visitors customarily offer incense at the temple first before visiting Tường Vân Pagoda next door. |
| Mid-8th month | Đền Cao An Phụ | Autumn ritual observance of the temple, more compact in scale than the fourth-month festival while retaining full sacrificial liturgy. |
| 5th to 7th days of the 3rd month | Nhẫm Dương Pagoda | Pagoda festival and memorial ceremony commemorating the parinirvāṇa of Patriarch Thủy Nguyệt Thông Giác according to Tào Động monastic rites. |
| 15th day of the 1st and 7th months | Nhẫm Dương and Tường Vân Pagodas | Major Buddhist full-moon observances shared across northern Vietnamese temples. |
The patriarchal memorial at Nhẫm Dương is more than a local temple affair. Monks and nuns from Tào Động ancestral temples across northern Vietnam regularly gather here, making the sixth day of the third lunar month a convocation of the entire lineage rather than a village fair. That gathering is what most clearly distinguishes an ancestral seat from an ordinary parish pagoda.
VILocation And How To Get There
- Address
- Phường Phạm Sư Mạnh, thành phố Hải Phòng, quần thể trải rộng sang phường Nhị Chiểu nơi có chùa Nhẫm Dương
- Getting there
- The Đền Cao and Kính Chủ Cave clusters are located in Phạm Sư Mạnh Ward, Hải Phòng City (formerly part of Kinh Môn Town, Hải Dương Province). Nhẫm Dương Pagoda lies in neighboring Nhị Chiểu Ward, so visiting the full complex requires planning a two-stage trip across the limestone range.
- Coordinates
- 20.9894, 106.5161
All three clusters are active places of worship, so visitors should observe temple etiquette by dressing modestly, removing hats when entering inner halls, and walking and speaking quietly in rear sanctuaries and caverns. At Kính Chủ Cave in particular, please do not touch or lean against the cliff-carved steles, as the inscriptions are engraved directly into natural limestone and cannot be restored if worn down. At Nhẫm Dương Pagoda, Thánh Hóa Cave is both a sacred sanctuary and an archaeological site, so please stay on the marked path and do not disturb or remove any rock or bone fragments.
Nearby places in the library
VIIContribute To This Page
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?Quick Questions
Who is venerated at Đền Cao An Phụ
The temple venerates Prince An Sinh Trần Liễu, father of Grand Commander Hưng Đạo Đại Vương Trần Quốc Tuấn. He passed away in 1251, and the temple on the summit of Mount An Phụ was founded during the Trần dynasty in his memory. The large stone statue on the lower slope represents Hưng Đạo Đại Vương and was inaugurated in 1998.
Which Zen lineage regards Nhẫm Dương Pagoda as its ancestral seat
Nhẫm Dương Pagoda is the ancestral seat of the Vietnamese Tào Động (Caodong) Zen school. Zen Master Thủy Nguyệt, titled Thông Giác Đạo Nam, traveled north to receive dharma transmission from Master Yiju Zhijiao on Mount Phoenix and returned in 1667 to propagate the lineage in northern Vietnam. He passed away in a cave on Mount Nhẫm Dương in 1704, now known as Thánh Hóa Cave.
How does Tào Động Zen differ from Lâm Tế Zen
Both belong to Chan (Zen) Buddhism and differ primarily in their pedagogical methods. Tào Động emphasizes silent illumination, sitting in meditation until the mind settles so innate clarity shines forth, alongside the Five Ranks of Lord and Vassal examining essence and function. Lâm Tế (Linji) makes frequent use of kōan contemplation and sudden shouts to precipitate awakening.
How many cliff-carved steles survive at Kính Chủ Cave
Heritage records note that the cave once held fifty-four inscriptions, of which forty-seven survive today, spanning from 1368 to the early twentieth century. The earliest two were carved in 1368 by Phạm Sư Mạnh. The collection was recognized as a National Treasure in 2017. The term ma nhai refers to smoothing a natural cliff face and engraving characters directly into the rock.
Why is Kính Chủ Cave called the Sixth Grotto under the Southern Sky
The title Nam Thiên đệ lục động was bestowed by Emperor Lê Thánh Tông when he visited the cavern in 1487, meaning the sixth most scenic grotto under the southern sky. It reflects a classical literary tradition of ranking celebrated caves rather than an administrative classification.