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Pinnacle

Pinnacle is a chemistry 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 Pinnacle rather than just read about it. In short: A pinnacle is an architectural element originally forming the cap or crown of a buttress or small turret, but afterwards used on parapets at the corners of towers and in many other situations. The pinnacle looks like a small spire.

Pinnacle — main illustration
Pinnacle — illustration

Key takeaways

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

Reference excerpt

A pinnacle is an architectural element originally forming the cap or crown of a buttress or small turret, but afterwards used on parapets at the corners of towers and in many other situations. The pinnacle looks like a small spire. It was mainly used in Gothic architecture. The pinnacle had two purposes:

Ornamental – adding to the loftiness and verticity of the structure. They sometimes ended with statues, such as in Milan Cathedral. Structural – the pinnacles were very heavy and often rectified with lead, in order to enable the flying buttresses to contain the stress of the structure vaults and roof. This was done by adding compressive stress (a result of the pinnacle weight) to the thrust vector and thus shifting it downwards rather than sideways.

History The accounts of Jesus' temptations in Matthew's and Luke's gospels both suggest that the Second Temple in Jerusalem had one or more pinnacles (Greek: το πτερυγιον του ιερου):

Then he (Satan) brought Him to Jerusalem, set Him on the pinnacle of the temple, and said to Him, "If You are the Son of God, throw Yourself down from here. Some have stated that there were no pinnacles in the Romanesque style, but conical caps to circular buttresses, with finial terminations, are not uncommon in France at very early periods. Eugène Viollet-le-Duc gives examples from Saint-Germer-de-Fly Abbey and the Basilica of Saint-Remi, and there is one of similar form at the west front of Rochester Cathedral.

In the 12th-century Romanesque two examples have been cited, one from Bredon in Worcestershire, and the other from Cleeve in Gloucestershire. In these the buttresses run up, forming a sort of square turret, and crowned with a pyramidal cap, very much like those of the next period, the Early English. In this and the following styles, mainly in Gothic architecture, the pinnacle seems generally to have had its appropriate uses. It was a weight to counteract the thrust of the vaults, particularly where there were flying buttresses; it stopped the tendency to slip of the stone copings of the gables, and counterpoised the thrust of spires; it formed a pier to steady the elegant perforated parapets of later periods; and in France especially served to counterbalance the weight of overhanging corbel tables, huge gargoyles, etc. In the Early English period the small buttresses frequently finished with gablets, and the more important with pinnacles supported with clustered shafts. At this period the pinnacles were often supported on these shafts alone, and were open below; and in larger work in this and the subsequent periods they frequently form niches and contain statues. About the Transition and during the Decorated Gothic period, the different faces above the angle shafts often finish with gablets. Those of the last-named period are much richer, and are generally decorated with crockets and finials, and sometimes with ball flowers. Very fine groups are found at Beverley Minster and at the rise of the spire of St Mary's, Oxford. Perpendicular pinnacles differ but little from Decorated, except that the crockets and finials are of later character. They are also often set angle-ways, particularly on parapets, and the shafts are panelled. In France pinnacles, like spires, seem to have been in use earlier than in England. There are small pinnacles at the angles of the tower in the Saintes Cathedral. At Roullet-Saint-Estèphe there are pinnacles in a similar position, each composed of four small shafts, with caps and bases surmounted with small pyramidal spires. In all these examples the towers have semicircular-headed windows.

See also

Gothic cathedrals and churches Gothic architecture High Gothic Rayonnant Cathedral architecture Pinnacle (geology)

References

This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Pinnacle". Encyclopædia Britannica. Vol. 21 (11th ed.). Cambridge University Press. p. 628.

Illustrations

Pinnacle: Pinnacles, studded with crockets, on King's College Chapel, Cambridge.
Pinnacles, studded with crockets, on King's College Chapel, Cambridge.
Pinnacle: Ornamental pinnacles of Milan Cathedral
Ornamental pinnacles of Milan Cathedral
Pinnacle: Architectural drawing of a Neo-Gothic flying buttress with pinnacles for the late 19th-century Votive Church in Vienna.
Architectural drawing of a Neo-Gothic flying buttress with pinnacles for the late 19th-century Votive Church in Vienna.
Pinnacle: Pinnacles on the top of walls and the corner of flying buttresses
Pinnacles on the top of walls and the corner of flying buttresses
Pinnacle: The early-Gothic Notre-Dame de Paris. Arrows show forces (black: forces of cathedral on the ground, green: forces of ground on cathedral). The weight of pinnacles helps keep the line of thrust inside the buttress.
The early-Gothic Notre-Dame de Paris. Arrows show forces (black: forces of cathedral on the ground, green: forces of ground on cathedral). The weight of pinnacles helps keep the line of thrust inside the buttress.

Worked examples

Example 1 — a first encounter with Pinnacle

Start with the simplest possible case. Write down what Pinnacle claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, 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 Pinnacle 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 Pinnacle 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 Pinnacle

In research
Pinnacle appears in chemistry 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 Pinnacle 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
Pinnacle is common in secondary-school and first-year university syllabi. It links to neighbouring topics Architectural elements, Ornaments (architecture), so understanding it makes those chapters shorter.
In everyday life
Look for Pinnacle 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 Pinnacle in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Pinnacle 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 Pinnacle out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pinnacle in simple terms?

A pinnacle is an architectural element originally forming the cap or crown of a buttress or small turret, but afterwards used on parapets at the corners of towers and in many other situations. The pinnacle looks like a small spire.

Why does Pinnacle matter?

Because it connects several chemistry 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 Pinnacle?

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 Pinnacle.

Tags

  • Architectural elements
  • Ornaments (architecture)

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