The geographical setting and physical environment of Pompeii and Herculaneum, including the Bay of Naples, the role of Mt Vesuvius, the natural features, resources, and the historical development of the two cities from Oscan settlement to Roman colony

What this dot point is asking

NESA expects you to know the physical geography of the Bay of Naples region, the volcanic geology of Mt Vesuvius, the agricultural and economic resources, the historical development of Pompeii and Herculaneum from pre-Roman to Roman times, and the long history of excavation and interpretation since 1748. Section I of the HSC paper typically opens with a context question.

The answer

The physical setting

Pompeii and Herculaneum lie on the Bay of Naples in the modern region of Campania. Pompeii sat on a volcanic plateau on the lower slopes of Mt Vesuvius, around 8 kilometres south-east of the volcano, with the navigable Sarno River nearby. Herculaneum was on the coast, about 7 kilometres south-west of the volcano, on a promontory between two streams. Both cities had access to the sea, fertile volcanic soils, and the trade routes of the western Mediterranean.

Mt Vesuvius is a stratovolcano. In AD 79 the cone was higher than today; the modern summit at 1,281 metres is the rim of a caldera formed by the AD 79 eruption. Roman authors (Strabo, Geography 5.4.8; Vitruvius, On Architecture 2.6.2) recognised the mountain's volcanic origin but did not predict the AD 79 eruption.

The Campanian plain

The volcanic soils around Vesuvius were exceptionally fertile, producing wine, olive oil, grain, and fruit. Pliny the Elder (Naturalis Historia 3.40, c. AD 77) described Campania as "the most beautiful of all regions, not only in Italy but in the whole world." The wine of Pompeii was exported in amphorae stamped with the maker's name; over 1,500 amphora workshops have been identified in the region.

Historical development

The sites were inhabited from at least the 8th century BC. The development falls into five phases.

Oscan and Etruscan period (8th to 5th century BC). Pompeii was founded by Oscan-speaking Italic peoples. Greek and Etruscan influences are visible. The Doric Temple in the Triangular Forum (6th century BC) is the oldest surviving structure.

Samnite period (5th to 1st century BC). Around 425 BC, the Samnites took control. The town walls and the original Forum date from this period. The House of the Faun (around 3,000 square metres) is the most spectacular Samnite-period building.

Social War and Roman colonisation (91 to 80 BC). Pompeii joined the Italian rebellion against Rome (the Social War, 91 to 88 BC). Sulla besieged and stormed the city in 89 BC. In 80 BC Pompeii was refounded as a Roman colony, Colonia Cornelia Veneria Pompeianorum. Roman veterans were settled; Oscan was replaced by Latin in public inscriptions.

Roman imperial period (1st century BC to AD 79). The cities became fashionable Roman towns. Major public buildings (the Amphitheatre c. 70 BC, the Stabian Baths, the Temple of Apollo, the Forum complex) were constructed. Wealthy Romans built villas at Pompeii, Herculaneum, Oplontis (Villa of Poppaea, Nero's wife), and Stabiae.

AD 62 earthquake to AD 79 eruption. A severe earthquake on 5 February AD 62, described by Seneca (Naturales Quaestiones 6.1), damaged temples, public buildings, and private houses. Reconstruction was incomplete when Vesuvius erupted on 24 August (or possibly 24 October) AD 79.

Investigation since 1748

Excavations at Herculaneum began in 1709 under Prince d'Elboeuf. Systematic excavation at Pompeii began in 1748 under Spanish military engineer Roque Joaquin de Alcubierre. Karl Weber (1750s) introduced systematic recording. Giuseppe Fiorelli (Director from 1860) developed the regio and insula numbering system still in use, and pioneered the plaster cast technique on body cavities (the famous body casts).

Modern excavation has prioritised stratigraphy and preservation over rapid clearance. Amedeo Maiuri (Director 1924 to 1961) led major work at Herculaneum. The Anglo-American Herculaneum Conservation Project (since 2001), led by Andrew Wallace-Hadrill, has shifted the focus to long-term conservation of already-excavated areas.

Historiography

Andrew Wallace-Hadrill (Herculaneum: Past and Future, 2011) argues the cities should be read as multi-layered Italic, Greek, Samnite, and Roman sites, not as purely Roman snapshots. Mary Beard (Pompeii: The Life of a Roman Town, 2008) treats them as "frozen" by the eruption but also as living examples of Roman urban life that can be compared across the Empire.

Key dates

How to read a source on this topic

Section I sources on the geographical and historical context typically include maps of the Bay of Naples, aerial photographs, plans of the cities, and extracts from Pliny the Elder, Strabo, or Vitruvius on the region. Three reading habits.

First, identify whether the source is ancient or modern. An aerial photograph of Pompeii in 2024 shows the modern coastline; the AD 79 coastline was about 1.5 kilometres closer. Plans of the cities reflect post-1748 excavation, not the full ancient layout (around one-third of Pompeii remains unexcavated).

Second, distinguish description from inference. Strabo's description of the Bay of Naples is contemporary observation; modern reconstructions of the AD 79 cone are scientific inference from geological data. State which you are using.

Third, weigh continuity against rupture. Pompeii is often presented as "frozen in time," but the AD 62 earthquake means many buildings were under reconstruction when the eruption struck. Treat the AD 79 evidence as a snapshot of a city already in transition.

Common exam traps

Treating Pompeii and Herculaneum as identical. They differ in size (Pompeii around 64 hectares, Herculaneum around 20 hectares), population (Pompeii around 11,000, Herculaneum around 4,000 to 5,000), and burial type (pumice and ash at Pompeii, pyroclastic flow at Herculaneum). State the difference.

Misdating the eruption. The traditional date is 24 August AD 79 (from Pliny the Younger's letters to Tacitus, Epistles 6.16 and 6.20). Recent evidence including a charcoal inscription found in 2018 reads "XVI K NOV" (16 days before 1 November, i.e. 17 October) and suggests 24 October. Note both dates.

Forgetting Oscan origins. Pompeii was not founded by Romans. Sulla's 80 BC colony is the third or fourth phase of the city.

Skipping the AD 62 earthquake. It is the most-asked context detail. Cite Seneca's Naturales Quaestiones 6.1.

In one sentence

Pompeii and Herculaneum, the two Bay of Naples cities buried by Mt Vesuvius on 24 August (or possibly 24 October) AD 79, were Oscan-Samnite-Roman towns whose geographical setting on fertile volcanic soils made them prosperous trade centres and whose long historical development from the 8th century BC to the AD 62 earthquake (Seneca, NQ 6.1) gave the AD 79 archaeological record its distinctively layered character, as Wallace-Hadrill and Beard emphasise.