Major Themes are curated, in-depth explorations of subjects drawn from the PIRIDI corpus — a producer, a workshop network, a distribution route, a production tradition. Each theme is built around a specific historical question and answers it by pulling evidence selectively from the database: inscriptions and their readings, findspots plotted in geographic context, artifact typologies, prosopographical profiles, and bibliographic sources.
Unlike a raw database search, a Major Theme presents that evidence as an integrated, visual narrative — combining interactive maps, typological charts, and annotated source lists into a single page designed to make the epigraphic record legible and meaningful. Each theme also includes an AI-generated biographical or contextual summary, produced from the structured database data and reviewed by the editorial team, to give readers an immediate interpretive entry point into the evidence.
The wines of Laietania constitute one of the best-documented commodity groups in the Piridi database, with a corpus of 31 objects attested exclusively through tituli picti — painted inscriptions on trade amphorae. This corpus emerges from the intersection of two complementary filter paths: the typology path, which identifies containers of Laietanian amphora classes regardless of their inscriptional content, and the product path, which captures objects bearing inscriptions that explicitly name a commodity. That all 31 objects satisfy both conditions simultaneously places them at the core of the epigraphically attested Laietanian wine trade, representing containers for which typological identification and explicit product labelling concur. Four product denominations survive in the inscriptions. Vinum is the most frequently attested (21 objects), appearing in original titulurae applied at the moment of packaging; its use without a regional qualifier indicates generic wine with no recorded appellation of origin — the commodity is identified but its specific provenance is not named in the inscription. The regionally specific denomination vinum Lauronense (10 objects) identifies the variety produced in the territory of the Laietani, centred on the Vallès Oriental plain of modern Catalonia, in the area of ancient Laurona whose name is preserved in the modern toponym Llerona, near Granollers north of Barcelona. A third denomination, vinum amineum Lic(---) (1 object), implies a named grape variety — the amineum vine being well attested in ancient agronomy as a prestige type — combined with a partially preserved gentilicium. Many of the formal tituli picti in this corpus also include numerals recording the years of ageing at the time of packaging, a standard quality marker in the Roman amphora trade, with four-year-old wine (vinum quadrimum) among the most commonly attested conventions. Strikingly, acetum — vinegar, a derivative of wine — is attested on a single object exclusively in a non-primary inscription, meaning it was recorded at a later stage of the container's commercial life after the original labelling; this implies either re-use of the amphora for a secondary product or a relabelling during redistribution, and cautions against reading every product denomination as evidence for the container's original contents. The Laietanian amphora sequence follows a well-defined evolutionary order tied to the Julio-Claudian dynasty. The Pascual 1 Laietana, characteristic of the Augustan period, gives way chronologically to the Dressel 3 Laietana (12 objects), and then to the Dressel 2 Laietana (27 objects), the dominant form through the end of the Julio-Claudian dynasty and the most abundantly attested type in this corpus. The dominance of the Dressel 2 Laietana marks the peak of this commercial success — the moment at which Laietanian wine reached its widest Mediterranean distribution. The wine of Lauro praised by Pliny the Elder for its excellent quality among the wines of Hispania (Naturalis Historia XIV, 71) is primarily documented in this amphora type, a correspondence that anchors the archaeological record in the ancient literary tradition. Other vessel forms present in the data are typological synonyms — transitional or equivalent variants — rather than independent canonical types, and do not alter the essential picture. Twelve individuals are documented through the tituli picti. Eleven appear in primary inscriptions and are to be identified as the principal commercial agents of the original trade — most plausibly negotiatores or mercatores active at the Laietanian production site. A notable cluster shares the Iulii gentilicium: Caius Iulius Tertius (2 objects), Caius Iulius Vitalis, Caius Iulius R[---], and Caius Iulius Fala[dus]?, suggesting a family network or collegial association at the origin of the commerce. Where stamps (sigilla) co-occur with primary tituli picti on the same containers, the combined evidence offers additional precision for identifying the production site and packaging context, since stamps typically attest the manufacturer or workshop while the painted inscription records the commercial transaction. Iulia Alcis stands apart: attested on two objects but exclusively in non-primary inscriptions, she belongs to a later stage of the containers' commercial life — redistribution, secondary ownership, or re-exportation — and should not be conflated with the agents of the original Laietanian packaging operation. The remaining agents — Lucius P(---) G(---) (2 objects), [-] Valerius Ruber, Marcus P(---) F(---), Lucius A(---) Y(---), Lucius C(---) H(---), Lucius I(---) L(---), and Caius L(---) L(--) — are identified only through abbreviated names, a common feature of tituli picti where brevity and legibility outweighed full nomenclature. The findspot distribution reveals the Mediterranean reach of Laietanian wine commerce. Tunisia — specifically Carthage (Délégation de Carthage, 12 objects) — accounts for the single largest concentration, consistent with the city's well-attested role as a redistribution node in the Roman western Mediterranean. France contributes 9 objects, the majority from the Aude (8 objects), the Narbonensian corridor along which Tarraconensian goods moved overland and by river toward the Atlantic and northern Gaul; a single object from Haute-Corse attests to the maritime route as well. Italy is equally represented (9 objects: 7 from Roma, 1 from Napoli, 1 from Ostia), confirming the role of the capital, its harbour city, and Campanian ports as endpoints of the western Mediterranean wine trade. A single object from Zaragoza records inland Hispanian circulation. Taken together, the pattern — Carthage, southern Gaul, and Rome as the principal nodes — integrates Laietanian wine firmly into the documented structure of early Imperial long-distance commerce in the western Mediterranean.
Baix Llobregat, the comarca extending along the lower course of the flumen Rubricatum south and west of the colonial city of Barcino (modern Barcelona), constitutes one of the most significant amphora production zones of the ager Laietanus documented in the Piridi epigraphic database. With 524 unique objects recovered at 35 findspots distributed across 9 municipalities, the corpus reflects an intensive productive landscape whose organisation and epigraphic character are clearly defined by the evidence. The area's rise as a centre of Laietanian wine production and export is intimately connected to the founding of the colony of Barcino between 15 and 13 BC, an event that provided the commercial infrastructure — including the Via Augusta and its river crossing at the Pont del Diable, built around 10 BC to mark the navigable limit of the flumen Rubricatum — that made large-scale amphora production and maritime export viable. The epigraphic record is defined by two inscription classes that together document the full productive cycle. Sigilla — stamped or moulded production marks — are attested on all 524 objects, establishing the corpus as overwhelmingly productive in character; the universal presence of a stamp mark confirms that systematic marking was a fundamental practice at these workshops. Tituli Ante Cocturam — marks applied to the clay before firing — appear on 182 objects, confirming that workshop identification extended to the production stage itself, before the vessel was completed. The coexistence of these two inscription classes on a substantial portion of the corpus reflects organised, multi-stage workshop administration consistent with industrial-scale figlinae. All 524 objects belong to Laietanian wine amphora typologies. Dressel 3 Laietana is the dominant form with 342 objects, followed by Pascual 1 Laietania (164 objects) and Dressel 2 Laietana (44 objects). The hierarchy between these three forms is meaningful: Dressel 3 Laietana and Pascual 1 Laietania are the principal vehicles of export from this study area, while Dressel 2 Laietana, though present, does not reach comparable volumes — a pattern that may reflect the competitive pressure of production zones further north, where the Maresme coast and the Vallès Oriental (vinum Lauronense) concentrated Dressel 2 output with greater commercial reach. The Dressel 3 Laietana record carries two distinctive epigraphic features specific to the Baix Llobregat: stamp dies circulated across several kilns, so that a single sigillum type may appear at multiple production sites; and it is particularly common to find two associated stamps on the pivot (puntal) of the amphora, with complex combinations of cognomina that point to a shared or collaborative marking system among affiliated workshops. Two actors are documented in the comarca through stamped inscriptions on amphorae. Caius Trocina Synecdemus, C(aii) l(ibertus) is by far the most extensively attested, documented on 38 Dressel 3 Laietana amphorae through sigilla dated to approximately the turn of the era to 30 AD — the period during which he was active as a slave in the Laietanian workshops. After his manumission he took the full name Caius Trocina Synecdemus, C(aii) l(ibertus), adopting the nomen of his patron from the gens Trocina of Barcino. He lived a long life: a funerary inscription found at the Castell de Castelldefels — within the comarca itself — records his later civic distinction as a Sevir Augustalis, the prestigious college responsible for the imperial cult in Roman colonies, an honour reserved for wealthy freedmen. The inscription was dedicated by his wife, Valeria Haline, who described him as an excellent husband. His trajectory — from enslaved person active in the amphora workshops of the Llobregat valley to Sevir Augustalis of Barcino — is one of the most fully recoverable individual biographies in the Laietanian epigraphic record. A second actor, Min(icius) Cel(---), is attested on a single Dressel 3 Laietana amphora through a sigillum, dated fin. s. I a. Chr. – p. sec. Tiberius, placing him at an earlier phase of the comarca's productive history. The geographic distribution of the 524 objects articulates the productive landscape of the lower Llobregat valley with considerable clarity. On the right bank, Sant Vicenç dels Horts accounts for 233 objects across 12 sites — the two dominant loci, Antic Mercat (115 objects) and carrer Francesc Moragas 17–19 (93 objects), almost certainly correspond to major kiln complexes — while Sant Boi de Llobregat contributes 95 objects from nine sites, with the Termes Romanes (41) and Plaça Constitució (30) as its principal recovery points. On the left bank, further upstream, El Papiol (Can Tintorer, 108 objects) and Castellbisbal (Can Pedrerol, 71 objects) each present the concentrated, single-site pattern characteristic of a discrete figlina. Together, these four municipalities account for 507 of the 524 objects, tracing an almost continuous productive corridor along both banks of the navigable flumen Rubricatum as far as the Pont del Diable. At Viladecans, the Ancoratge de Les Sorres (7 objects) — an anchorage site on the Llobregat delta — provides direct evidence of maritime loading and the coastal transfer of Laietanian amphorae, connecting the river transport corridor to the broader Mediterranean distribution network. The remaining municipalities along the valley (Rubí, Sant Joan Despí, Cornellà de Llobregat, Gavà) contribute marginal finds that complete the picture of a productive landscape organised around the complementary axes of river navigation and Mediterranean maritime trade.