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Preah Khan

Preah Khan is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Preah Khan rather than just read about it. In short: Preah Khan (Khmer: ប្រាសាទព្រះខ័ន; "Royal Sword") is a Buddhist temple at Angkor, Cambodia, built in the 12th century for King Jayavarman VII to honor his father. It is located northeast of Angkor Thom and just west of the Jayatataka baray, with which it was associated.

Preah Khan — main illustration
Preah Khan — illustration

Key takeaways

  • Preah Khan belongs to engineering; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Preah Khan to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Preah Khan from memory before moving on to harder problems.

Reference excerpt

Preah Khan (Khmer: ប្រាសាទព្រះខ័ន; "Royal Sword") is a Buddhist temple at Angkor, Cambodia, built in the 12th century for King Jayavarman VII to honor his father. It is located northeast of Angkor Thom and just west of the Jayatataka baray, with which it was associated. It was the centre of a substantial organisation, with almost 100,000 officials and servants. The temple is flat in design, with a basic plan of successive rectangular galleries around a Buddhist sanctuary complicated by Hindu satellite temples and numerous later additions. Like the nearby Ta Prohm, Preah Khan has been left largely unrestored, with numerous trees and other vegetation growing among the ruins.

History Preah Khan was built on the site of Jayavarman VII's victory over the invading Chams in 1181 . Unusually the modern name, meaning "holy sword", is derived from the meaning of the original—Nagara Jayasri (holy city of victory).[1] The site may previously have been occupied by the royal palaces of Yasovarman II and Tribhuvanadityavarman.[2] The temple's foundation stela has provided considerable information about the history and administration of the site: the main image, of the bodhisattva Avalokiteśvara in the form of the king's father, was dedicated in 1191 (the king's mother had earlier been commemorated in the same way at Ta Prohm). 430 other deities also had shrines on the site, each of which received an allotment of food, clothing, perfume and even mosquito nets;[3] the wealth and treasure of this ruin includes gold, silver, gems, 112,300 pearls and a cow with gilded horns.[4] The institution combined the roles of city, temple and Buddhist university: there were 97,840 attendants and servants, including 1000 dancers[5] and 1000 teachers.[6]

Preah Khan experienced a slow decline because the Khmer royalty stopped supporting it around the 15th century. As support from the royal family dwindled, it became difficult to maintain and use the complex. Despite this decline, certain sections of the site continued to be used for religious or cultural activities. The temple is still largely unrestored: the initial clearing was from 1927 to 1932, and partial anastylosis was carried out in 1939. Since then free-standing statues have been removed for safe-keeping, and there has been further consolidation and restoration work. Throughout, the conservators have attempted to balance restoration and maintenance of the wild condition in which the temple was discovered: one of them, Maurice Glaize, wrote that;

The temple was previously overrun with a particularly voracious vegetation and quite ruined, presenting only chaos. Clearing works were undertaken with a constant respect for the large trees which give the composition a pleasing presentation without constituting any immediate danger. At the same time, some partial anastylosis has revived various buildings found in a sufficient state of preservation and presenting some special interest in their architecture or decoration.[7] Since 1991, the site has been maintained by the World Monuments Fund. It has continued the cautious approach to restoration, believing that to go further would involve too much guesswork, and prefers to respect the ruined nature of the temple. One of its former employees has said, "We're basically running a glorified maintenance program. We're not prepared to falsify history".[8] It has therefore limited itself primarily to stabilisation work on the fourth eastern gopura, the House of Fire and the Hall of Dancers.[9]

The site

The outer wall of Preah Khan is of laterite, and bears 72 garudas holding nagas, at 50 m intervals. Surrounded by a moat, it measures 800 by 700 m and encloses an area of 56 hectares (140 acres). To the east of Preah Khan is a landing stage on the edge of the Jayatataka baray, which measures 3.5 by 0.9 km (2 by 1 mi). This also allowed access to the temple of Neak Pean in the centre of the baray. Once dried up, the Jayatataka baray is now filled with water again, as at the end of each rainy season, all excess water in the area is diverted into it. As usual Preah Khan is oriented toward the east, so this was the main entrance, but there are others at each of the cardinal points. Each entrance has a causeway over the moat with nāga-carrying devas and asuras similar to those at Angkor Thom; Glaize considered this an indication that the city element of Preah Khan was more significant than those of Ta Prohm or Banteay Kdei.[10] Halfway along the path leading to the third enclosure, on the north side, is a House of Fire (or Dharmasala) similar to Ta Prohm's. The remainder of the fourth enclosure, now forested, was originally occupied by the city; as this was built of perishable materials it has not survived. The third enclosure wall is 200 by 175 metres (656 by 574 ft). In front of the third gopura is a cruciform terrace. The gopura itself is on a large scale, with three towers in the centre and two flanking pavilions. Between the southern two towers were two celebrated silk-cotton trees, of which Glaize wrote, "resting on the vault itself of the gallery, [they] frame its openings and brace the stones in substitute for pillars in a caprice of nature that is as fantastic as it is perilous."[11] One of the trees is now dead, although the roots have been left in place. The trees may need to be removed to prevent their damaging the structure.[12] On the far side of the temple, the third western gopura has pediments of a chess game and the Battle of Lanka, and two guardian dvarapalas to the west.

… excerpt ends here. Continue reading the full article.

Illustrations

Preah Khan illustration
Preah Khan: One Gigantic Guardian Dvarapala at the West Entrance to the Interior Galleries, photo taken in 1942.
One Gigantic Guardian Dvarapala at the West Entrance to the Interior Galleries, photo taken in 1942.
Preah Khan: Two Gigantic Guardian Dvarapalas with heads intact, at West Gopura, photo taken in 1942.
Two Gigantic Guardian Dvarapalas with heads intact, at West Gopura, photo taken in 1942.
Preah Khan illustration
Preah Khan: Preah Khan is northeast of Angkor Thom.
Preah Khan is northeast of Angkor Thom.

Worked examples

Example 1 — a first encounter with Preah Khan

Start with the simplest possible case. Write down what Preah Khan claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Preah Khan before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Preah Khan ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Preah Khan

In research
Preah Khan appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Preah Khan in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Preah Khan is common in secondary-school and first-year university syllabi. It links to neighbouring topics Angkorian sites in Siem Reap province, Buddhist temple ruins in Cambodia, Buddhist temples completed in the 12th century, so understanding it makes those chapters shorter.
In everyday life
Look for Preah Khan outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Preah Khan in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Preah Khan means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Preah Khan out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Preah Khan in simple terms?

Preah Khan (Khmer: ប្រាសាទព្រះខ័ន; "Royal Sword") is a Buddhist temple at Angkor, Cambodia, built in the 12th century for King Jayavarman VII to honor his father. It is located northeast of Angkor Thom and just west of the Jayatataka baray, with which it was associated.

Why does Preah Khan matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Preah Khan?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Preah Khan.

Tags

  • Angkorian sites in Siem Reap province
  • Buddhist temple ruins in Cambodia
  • Buddhist temples completed in the 12th century
  • Buddhist temples in Siem Reap province
  • Buildings and structures completed in 1191
  • Former Hindu temples in Cambodia
  • Religious buildings and structures completed in the 1190s

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