---
title: "Natural History — AP Latin Definition & Exam Guide"
description: "The Natural History is Pliny the Elder's massive encyclopedia of the natural world. Know it for AP Latin Unit 2, where his scholarly curiosity drives Letter 6.16."
canonical: "https://fiveable.me/ap-latin/key-terms/natural-history"
type: "key-term"
subject: "AP Latin"
unit: "Unit 2"
---

# Natural History — AP Latin Definition & Exam Guide

## Definition

The Natural History (Naturalis Historia) is the encyclopedic work of Pliny the Elder, the scholar, author, and fleet admiral who died investigating the eruption of Mt. Vesuvius in 79 CE. On AP Latin, it's essential background for Pliny the Younger's Letter 6.16, a required Unit 2 text.

## What It Is

The **Natural History** (*Naturalis Historia*) is the enormous encyclopedia written by [Pliny the Elder](/ap-latin/key-terms/pliny-the-elder "fv-autolink") (c. 23-79 CE), covering pretty much everything the Romans knew about the natural world. You don't read it on the [AP Latin exam](/ap-latin/ap-latin-exam "fv-autolink"), but you absolutely need to know it exists and who wrote it, because it tells you who Pliny the Elder *was*. He wasn't just an admiral in the Roman fleet at Misenum. He was a scholar obsessed with observing and recording the world around him.

That identity is the engine of Letter 6.16, the required Unit 2 reading. When Vesuvius erupts, Pliny the Elder first sails *toward* the volcano out of scientific curiosity (the same impulse that produced the Natural History), and only then turns the trip into a rescue mission. [Pliny the Younger](/ap-latin/unit-3/letters-10-37-and-10-90-emperor-trajan-aqueducts/study-guide/6a141e0559ef7645 "fv-autolink"), his nephew and adopted heir, writes the letter to the historian Tacitus to preserve his uncle's death as a story worth telling. Knowing the Natural History is what makes the Elder's behavior in the letter make sense.

## Why It Matters

The Natural History lives in **[Unit 2](/ap-latin/unit-2 "fv-autolink") (Pliny's Letters: Eruption of Mt. Vesuvius), Topic 2.1**. It directly supports two learning objectives. **[AP Latin](/ap-latin "fv-autolink") 2.1.D** asks you to know who Pliny the Younger, Pliny the Elder, and Tacitus are and how they're related, and the Natural History is the Elder's defining accomplishment. **AP Latin 2.1.O** asks you to describe references and allusions to influential people and literary works, and the CED's essential knowledge explicitly names Pliny the Elder as an author and scholar who wrote the Natural History. It also feeds genre analysis under **AP Latin 2.1.N**, since the Natural History (a prose encyclopedia) sits alongside epistles, historiography, and didactic poetry in the Roman literary landscape. When Letter 6.16 calls the Elder *eruditissimus* and shows him taking notes mid-disaster, the Natural History is the unspoken reason why.

## Connections

### Pliny Letter 6.16 (Unit 2)

The Natural History explains the Elder's motives in the required passage. He sails toward Vesuvius as a scientist first and a rescuer second, and his curiosity about natural phenomena is the same drive that produced his encyclopedia.

### [Annals (Unit 2)](/ap-latin/key-terms/annals)

[Tacitus](/ap-latin/key-terms/tacitus "fv-autolink") asked Pliny the Younger for the account of the Elder's death so he could use it in his own historiography. Together the Natural History, the Letters, and the Annals show three different Roman genres orbiting one event.

### [Allusion (Unit 2)](/ap-latin/key-terms/allusion)

LO 2.1.O is all about catching references to [influential people](/ap-latin/unit-6/vergil-additional-aeneid-trojan-war-study-guide/study-guide/bdc96085b03b371a "fv-autolink") and works. The Natural History is the textbook example here, since Letter 6.16 leans on the reader already knowing the Elder's reputation as a scholar.

### [Didactic poetry (Unit 2)](/ap-latin/key-terms/didactic-poetry)

Like [didactic poetry](/ap-latin/key-terms/didactic-poetry "fv-autolink"), the Natural History exists to teach. Comparing it to the genres the CED lists (epistles, epigrams, historiography) helps you see that Romans packaged knowledge in very different literary forms.

## On the AP Exam

You won't translate the Natural History itself. It shows up as background and context knowledge. Multiple-choice or short-answer questions on Letter 6.16 can ask why Pliny the Elder reacts to the eruption the way he does, who the major figures in the letter are, or what makes the Elder a credible eyewitness, and the Natural History is the answer behind all of those. No released FRQ has asked about the work by name, but contextual questions on the Pliny passages reward you for knowing that the Elder was an author-scholar, that the Younger was his nephew and adopted heir, and that Tacitus was the addressee gathering material for his histories.

## Natural History vs Pliny the Younger's Letters (Epistulae)

Two Plinys, two famous works, and the exam expects you to keep them straight. Pliny the **Elder** wrote the Natural History, an encyclopedia of the natural world, and died at Vesuvius in 79 CE. Pliny the **Younger** wrote the Letters, including 6.16, the highly polished literary epistles you actually read in Unit 2. The Younger writes about the Elder, not the other way around.

## Key Takeaways

- The Natural History is the encyclopedic work of Pliny the Elder, an author, scholar, and admiral of the Roman fleet who died in the Vesuvius eruption of 79 CE.
- It is background knowledge for AP Latin Unit 2, where Pliny the Younger's Letter 6.16 describes his uncle's death to the historian Tacitus.
- The Elder's scientific curiosity, the same drive behind the Natural History, is why he initially sails toward the eruption to observe it up close.
- Pliny the Elder was Pliny the Younger's maternal uncle, helped raise and educate him, and adopted him in his will.
- Knowing the Natural History supports LO 2.1.D (identifying the two Plinys and Tacitus) and LO 2.1.O (recognizing references to influential people and works).

## FAQs

### What is the Natural History in AP Latin?

It's the encyclopedia written by Pliny the Elder (c. 23-79 CE) covering the natural world. On AP Latin it matters as context for Letter 6.16 in Unit 2, where his scholarly curiosity shapes how he responds to the Vesuvius eruption.

### Did Pliny the Younger write the Natural History?

No. The Natural History was written by Pliny the Elder, his uncle. Pliny the Younger wrote the Letters (Epistulae), including Letter 6.16, the required AP text describing his uncle's death at Vesuvius in 79 CE.

### Do I have to read the Natural History for the AP Latin exam?

No. It's not part of the required reading list. You only need to know that Pliny the Elder wrote it, because that fact explains his character and motives in Letter 6.16.

### How is the Natural History different from Tacitus' Annals?

The Natural History is an encyclopedia of natural knowledge by Pliny the Elder, while the Annals is historiography by Tacitus, the historian Pliny the Younger addresses in Letter 6.16. Different authors, different genres, both tied to the same Vesuvius story.

### Why did Pliny the Elder sail toward Vesuvius?

He first set out to observe the strange cloud up close as a scholar, the same curiosity that produced the Natural History, then turned the voyage into a rescue mission when a plea for help arrived. He died in the eruption in 79 CE.

## Related Study Guides

- [2.1 Pliny Letter 6.16.1-12 Study Guide](/ap-latin/unit-2/pliny-letter-6-16-1-12-study-guide/study-guide/d0eca604b4c6c554)

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