Lex Aquilia — chapter 3 (damage to property)

Chapter 3 of the lex Aquilia provided a remedy for wrongful damage to property falling outside the scope of chapter 1. Where chapter 1 (studied last week) addressed the killing of slaves and four-footed beasts of the herd—the occidere cases—chapter 3 dealt with all other kinds of damnum iniuria datum, that is, wrongful loss or damage inflicted on another's property. The most common cases under chapter 3 involved wounding (urere), breaking (frangere), or rendering useless (corrumpere) the property of another, whether animate (e.g. wounding a slave without killing him) or inanimate (e.g. burning grain, smashing crockery, tearing clothes).

The statutory remedy under chapter 3 was an action for the highest value of the thing in the previous thirty days. This valuation rule—markedly shorter than the annus provision in chapter 1—posed distinct interpretative challenges and invited creative pleading. The iurisprudentes grappled with questions of causation, remoteness, contributory negligence, and the meaning of iniuria (unlawfulness) in contexts far removed from the agrarian economy of the third-century BC statute.

As with chapter 1, the praetorian edict extended the rigid statutory action through actiones utiles (analogous actions) and the actio in factum, enabling recovery where the defendant had not personally and directly inflicted the damage or where the thing damaged was not susceptible to ownership. This process of juristic interpretation transformed a narrow plebiscite into a general law of wrongful damage, laying the foundations for modern tortious liability in civilian systems.

This note examines the text of chapter 3, the case law preserved in the Digest, the interplay between statutory action and praetorian innovation, the valuation principles unique to chapter 3, and the doctrinal debates that shaped Roman delictual thinking. Mastery of chapter 3 is essential both for understanding the lex Aquilia as a coherent whole and for grasping how Roman jurists used analogical reasoning to adapt archaic legislation to evolving social and economic conditions.

The lex Aquilia was a plebiscite enacted in the early third century BC, likely around 287–286 BC, shortly after the lex Hortensia confirmed that plebiscites bound the entire Roman people. Chapter 3 completed the statutory scheme by sweeping up all wrongful damage not covered by chapter 1. Textual fragments suggest that chapter 2 dealt with an adstipulator (secondary creditor) who released a debtor fraudulently, but chapter 2 fell into desuetude early and left little trace in the classical sources.

Chapter 3 responded to two practical needs. First, the rigid wording of chapter 1—'occidere'—excluded acts that wounded or maimed but did not kill. A slave rendered permanently disabled might lose more value than one who died, yet the owner had no remedy under chapter 1. Second, chapter 1 was confined to slaves and livestock (quadrupes), leaving damage to inanimate property (grain, wine, buildings, movables) without recourse unless the conduct also amounted to furtum or rapina. Chapter 3 therefore provided a residual delictual action with broad application.

The historical backdrop is the agrarian economy of early republican Rome. Most litigation under chapter 3 involved rustic property: burning crops, breaking farm tools, wounding draught animals or slaves working the land. Urbanisation, trade, and craft production expanded the range of actionable damage: dyers ruining garments, builders demolishing structures negligently, physicians injuring patients. The jurists' task was to mediate between the archaic statutory text—drafted for a simpler society—and the complexity of imperial commerce.

Valuation over thirty days (rather than a year) reflects the perishable or fluctuating nature of the interests protected. Grain, wine, fruit, and livestock prices could vary sharply within weeks. The shorter limitation also reduced the plaintiff's forensic burden: proving the highest value over thirty days was simpler than over a year. Yet it created anomalies: a slave wounded on the eve of a profitable sale might yield a high id quod interest, but if the injury occurred thirty-one days before trial, the plaintiff recovered nothing.

By the late Republic, the praetor had begun to supplement chapter 3 with actiones utiles and in factum actions, accommodating non-owners (ususfructuaries, pledgees, bonae fidei possessors) and indirect causation. This interplay of statute and edict exemplifies the Roman genius for legal development without legislation: the iurisprudentes stretched the lex Aquilia into a general theory of wrongful harm, prefiguring the nineteenth-century civilian codes.

*Scope: ceterarum rerum***

Chapter 3 opened with 'ceterarum rerum' ('as to other things'), signalling its residual character. Any tangible property not covered by chapter 1 fell within its ambit. This included slaves (when wounded but not killed), other animals (wild beasts, birds, fish), crops, wine, oil, garments, furniture, buildings, and any other res corporales. The jurists insisted that the thing damaged must be capable of ownership; pure economic loss or damage to res extra commercium lay outside the statute, though the praetor might grant an actio in factum on the facts.

*The triad: urere, frangere, corrumpere***

The statutory text used three verbs: urere (to burn), frangere (to break), and corrumpere (to spoil, corrupt, or render useless). These were understood as overlapping, not exhaustive, categories. Urere covered actual burning—torching a granary, singeing wool—but also scalding, scorching, or otherwise damaging by heat. Frangere meant breaking, smashing, tearing, cutting—any physical disruption of integrity. Corrumpere was the broadest: to spoil, ruin, deteriorate, or render less useful. Mixing sand with grain, adulterating wine, polluting water, or negligently treating a slave's illness all fell under corrumpere.

The iurisprudentes debated whether these verbs required direct physical contact. On one view, urere and frangere connoted manual interference, but corrumpere could encompass omissions or indirect causation. For example, starving a slave to death or failing to feed livestock was treated by some jurists as corrumpere, though others denied a statutory action for omission and granted only an actio utilis. The tension mirrors the broader question whether the lex Aquilia punished only positive acts (facere) or also non facere.

*Valuation: quanti ea res in diebus triginta proximis fuit***

Under chapter 3, damages were assessed at 'whatever value the thing had in the nearest thirty days'. The phrase in diebus triginta proximis was ambiguous: did it mean the thirty days before the wrongful act (looking backward from the delict) or the thirty days before judgment (backward from litis contestatio)? The weight of juristic opinion favoured the former: the relevant window was the thirty days preceding the wrongful damage. This interpretation aligned with the annus rule in chapter 1 and avoided rewarding the plaintiff for post-delict price increases unrelated to the defendant's conduct.

The Roman 'cases' are not judgments in the modern common-law sense but responsa and quaestiones recorded by the iurisprudentes. Each represents a doctrinal position, often contested, that shaped the application of chapter 3.

The slave wounded by negligent medical treatment

Ulpian (ad Edictum 18, D.9.2.7.8) discusses a physician who undertakes to treat a slave's wound and, through negligent surgery or aftercare, causes the slave to die or suffer permanent harm. Ulpian holds that the physician is liable under chapter 3 for corrumpere: he has spoiled the slave's health. If the physician was merely unskilled (imperitus) rather than negligent, he is still liable—medical incompetence counts as culpa. The valuation includes not only the diminution in the slave's market price but also consequential loss such as the cost of hiring a replacement and lost productivity. This responsum established that professional negligence fell squarely within the lex Aquilia and that culpa extended to failure to meet the standard of a reasonably competent practitioner.

The barber who cuts a customer's throat

Mela, as reported by Ulpian (D.9.2.11pr), posits a barber shaving a customer in a public place. A ball game nearby causes a distraction; the barber turns his head and slashes the customer's throat with the razor. Proculus held that the barber was liable under chapter 3 for culpa: one who undertakes a dangerous task in a risky location must exercise due care. The barber's want of attention constituted negligence. This scenario illustrates the Romans' flexible concept of fault, encompassing momentary inattention and poor judgment about where to perform hazardous activities.

Burning another's crops: the arson cases

Several fragments treat urere. In one, a farmer burns stubble on his own land; the fire escapes and consumes his neighbour's grain (D.9.2.30.3, Paulus). If the farmer failed to take precautions (e.g. burning on a windy day without clearing firebreaks), he is liable for culpa. If the fire spread despite all reasonable care, he escapes liability—the damage was not iniuria. Another scenario involves a landowner who lawfully burns rubbish on a calm day, but a sudden gust carries embers onto neighbouring property. The jurists debated whether sudden natural events (vis maior) negatived iniuria; the majority held that liability required fault, not strict responsibility.

The dyer who spoils garments

Ulpian (D.9.2.9.3) considers a dyer who accepts clothing for dyeing and ruins it by using the wrong mordant or overheating the vat. The dyer is liable under chapter 3 for corrumpere. The measure of damages is the value of the garment plus any consequential loss, such as the client's inability to attend a public ceremony and resultant reputational harm. This case affirmed that contractual bailees could incur Aquilian liability alongside (or in lieu of) contractual remedies. It also illustrates how corrumpere reached acts that diminished utility without physical destruction.

Wounding a valuable slave on the eve of sale

Julian (D.9.2.22pr) discusses a slave trained as an actor, due to perform in a lucrative show. The defendant wounds the slave two days before the performance, rendering him unable to appear. The owner sues under chapter 3. Julian holds that the plaintiff may recover the highest value of the slave in the preceding thirty days plus the lost performance fees and hire charges, provided they were foreseeable and proximate. The thirty-day valuation captures the slave's market peak, and the id quod interest principle adds consequential loss. This responsum illustrates the expansive approach to damages and the jurists' willingness to transcend the statutory text.

Breaking amphoras and spilling wine

In several fragments (e.g. D.9.2.27.21, Ulpian), the jurists treat breaking storage vessels (dolia, amphorae). If a carter negligently upsets amphoras, spilling wine, he is liable for frangere (breaking the jars) and for the value of the wine lost—treated as consequential damage or as a separate instance of corrumpere. The fragments debate whether the wine itself is 'broken'—the conclusion is that spilling is subsumed under corrumpere or analogised to frangere if the loss flows directly from the physical act.

The builder who demolishes a neighbour's wall

Ulpian and Paulus discuss a builder who, in demolishing his own structure, negligently causes a neighbour's wall to collapse (D.9.2.27.29). He is liable under chapter 3 for frangere. The damages include the cost of rebuilding (valued as at the date of damage) plus any consequential harm, such as damage to goods stored in the collapsed building. The cases emphasise that liability extends to negligent construction and demolition—precursors to the modern law of nuisance and negligence in building works.

These 'landmark cases' collectively demonstrate the breadth of chapter 3, the centrality of fault, the flexibility of valuation, and the jurists' readiness to extend the statute by interpretation and analogy.

See practice questions below.

See further reading below.