engineering

Lajim Tower

Lajim Tower 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 Lajim Tower rather than just read about it. In short: The Lajim Tower (Persian: برج لاجیم, romanized: Borj-e Lajim), also known as Tomb Tower of Lajim, is a 14-metre-high (46 ft) cylindrical tower used as a mausoleum, that is located in the village of Lajim near Savadkuh, in the province of Mazandaran, Iran. The tower was completed in 413 AH (1022/1023 CE), during the Bavand dynasty that ruled over the region at the time.

Key takeaways

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

Reference excerpt

The Lajim Tower (Persian: برج لاجیم, romanized: Borj-e Lajim), also known as Tomb Tower of Lajim, is a 14-metre-high (46 ft) cylindrical tower used as a mausoleum, that is located in the village of Lajim near Savadkuh, in the province of Mazandaran, Iran. The tower was completed in 413 AH (1022/1023 CE), during the Bavand dynasty that ruled over the region at the time. The mausoleum was added to the Iran National Heritage List on 24 January 1935 and is administered by the Cultural Heritage, Handicrafts and Tourism Organization of Iran.

Architecture The tower has a cylindrical burial chamber crowned by a double dome, though the outer dome has not survived. It is likely the outer dome was originally conical in shape, typical for tomb towers in the region from the same period. The interior of the building, from the base to the conical dome, is perfectly round. The entrance to the burial chamber is on the eastern side. The structure is 14 metres (46 ft) high, with an outer diameter of 9 metres (30 ft). From the base to the conical dome, the diameter of the tower is 5.47 metres (17.9 ft). Decorative features are concentrated below the dome surrounding the entrance. Directly below the dome is a row of shallow arched niches. Below this is a narrow band of geometric patterns, separating it from two inscriptive bands. The upper band is written in Pahlavi, the language of the pre-Islamic Sasanian Empire, and the lower band is in the Kufic calligraphic style. The Pahlavi inscription is largely damaged and has not yet been deciphered. The Kufic inscription contains the name of the person buried in the tomb – Abu'l Favaris Shahriyar bin Abbas bin Shahriyar, and bears the date 413 AH (1022/1023 CE). It has been claimed that the Kufic inscription reads, in Persian:

Persian: ēn ān ī gumbad <ī> Abulwari(s) Šahryār bin Abbas bin Šahryār. Cihrzād mād ī ōy. ādarōg Cihr[zā]d *duxt bin Silēxūr bin […]sy[…]t[…]s/š māh šahr[iwar] wad[ … ] marzēn ēn gōmbad <ī> šāh tuwānmand sāl 300 90 māh frawardīn bun frōd kard., lit. 'This is the dome of Abulfaris Šahryār son of Abbas son of Šahryār. Cihrzād is his mother. An Ādarōg Fire *Cihrzād daughter of *Silēxūr of [ … ] in the month of Šahriwar [ … ] laid down the foundations of the dome of the powerful king in the year 390, month of Frawardīn.' The Lajim Tower inscriptions represent the first known use of the word "qubba" referring to the domed structure of the building, demonstrating the architectural influence of Islam in the region. The tower was an important monument that drew the attention of North Iranian rulers who valued pre-Islamic art and script. The entranceway is crowned by a pointed arch and set inside a shallow niche with a second pointed arch. Its tympanum features a brick honeycomb pattern. The plain cylindrical interior chamber is lit solely by the entrance.

Use For many years, it was believed that the tower contained the tomb of Imamzadeh Abdullah, a misconception subsequently corrected. The tower was originally a military structure, part of the Bavand rulers' fortifications. However, it later became the burial site for a prominent figure of the Bavand dynasty. In 1938, the tower was restored from materials sourced in Tehran in partnership with the Shirgah Traverse Manufacturing factory. Further restorations were completed in the 1990s to repair serious damage to the Kufic inscription, took. Since these restorations, the tower has become an Islamic pilgrimage site for residents of the Lajim village and surrounding rural areas of Savadkuh. The ornately carved inscriptions under the dome make the brick structure an artistically significant example of ancient Iranian architecture and design.

Illustrations

Worked examples

Example 1 — a first encounter with Lajim Tower

Start with the simplest possible case. Write down what Lajim Tower 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 Lajim Tower 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 Lajim Tower 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 Lajim Tower

In research: Lajim Tower 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 Lajim Tower 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: Lajim Tower is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1020s establishments in Asia, Bavandid architecture, Buildings and structures completed in 1022, so understanding it makes those chapters shorter.
In everyday life: Look for Lajim Tower 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 Lajim Tower in 20 minutes

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

Frequently asked questions

What is Lajim Tower in simple terms?

Why does Lajim Tower 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 Lajim Tower?

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 Lajim Tower.