ancient Roman architecture

Basis of Roman attribution

Record the evidence and interpretive criteria supporting inclusion, including competing local or chronological classifications.

1. Which archaeological contexts, inscriptions, dated components or scholarly arguments support calling this work or phase Roman? provenance
2. Does the attribution concern construction, patronage, occupation, remodelling or stylistic influence, and which of these establishes inclusion? boundary

Evidenced construction phases

Represent dated and relative phases without assigning a single date to heterogeneous fabric.

1. Which joints, blocked openings, stratigraphic relationships or material changes establish separate building episodes? provenance
2. What date range and uncertainty can be assigned to each episode, distinguishing original construction from reused components? measurement

Programme and alternatives

Record primary, mixed and changing uses alongside plausible alternative interpretations.

1. Which arrangements or installations support the proposed use, such as bathing suites, seating, shrines, shops or domestic reception spaces? definition
2. Which proposed functions depend on analogy rather than evidence from this work, and what alternative uses remain plausible? boundary

Routes and access distinctions

Record how entrances, courts, corridors, stairs and thresholds shaped possible movement without assuming users' identities.

1. Which routes connect streets, entrances, principal rooms and service areas in each architectural phase? definition
2. What evidence supports proposed distinctions between ceremonial, everyday and service access or between different user groups? provenance

Load-bearing systems and interfaces

Record evidenced structural arrangements and interactions between construction materials or phases.

1. Which components carry loads, and where are arches, vaults, domes, lintels or timber systems observed rather than reconstructed? definition
2. What spans, wall thicknesses and support dimensions are measured, and which inaccessible or missing elements limit interpretation? measurement

Fabric, facing and reuse

Connect cores, facings, finishes and reused elements to their evidenced locations and phases.

1. Which materials form the structural core, facing, paving and finish, and what evidence supports their identification and origin? provenance
2. Are columns, capitals, inscriptions and decorative elements in their original positions, reused in antiquity or introduced during later restoration? boundary

Site and network dependencies

Identify external connections necessary to understand siting and operation.

1. How did the work connect to contemporary streets, public spaces, terrain and neighbouring structures? definition
2. Which water supply, drainage, heating or other service connections are evidenced, and were they contemporary with the proposed use? provenance

Commission and builder evidence

Separate evidence for patrons, dedicators, funders, designers and builders rather than treating them as interchangeable.

1. What evidence identifies commissioners, funders, dedicators or builders, and which roles does it actually establish? provenance
2. Which proposed connections between patronage, labour organisation and architectural choices remain interpretations rather than directly documented relationships? boundary

Evidence status of visible form

Identify what survives and the evidence supporting proposed missing volumes, elevations and finishes.

1. Which parts are surviving ancient fabric, displaced fragments, later repairs or modern reconstructions? boundary
2. What supports reconstructed roof forms, upper storeys, colonnades and surface treatments, and where do competing reconstructions differ? provenance

Fabric-sensitive next actions

Identify justified documentation or review steps and the evidence that proposed interventions could obscure or damage.

1. Where are cracking, deformation, water ingress, mortar loss or separation of facing and core documented, and what evidence shows whether they are changing? measurement
2. Before cleaning, stabilisation, reconstruction or altered visitor access, which Roman fabric and phase relationships require documentation, specialist assessment and verification of applicable permissions? action

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Cult buildings (podium temples, mithraea, and later reuse as churches)
• Civic complexes (fora, basilicas, curiae, macella)
• Spectacle buildings (theatres, amphitheatres, circuses)
• Baths (thermae and balnea) with palaestrae
• Water, sewer and harbour works (aqueducts, cisterns, nymphaea, cloacae, ports)
• Housing (insula, atrium domus, villa rustica and villa urbana)
• Military and defensive works (castra, town walls, gates)
• Honorific and funerary monuments (triumphal arches, columns, mausolea, columbaria)

1. Which of these kinds and varieties hold for the sense of ancient Roman architecture this model covers, and on what evidence? provenance

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Getty Art & Architecture Thesaurus (AAT) - 300020541 - Style/period term 'Ancient Roman'; used to index works and sites, not a unique monument ID.
• Library of Congress Subject Headings - Architecture, Roman - Standard bibliographic heading; narrower terms exist for building types (e.g. Basilicas, Roman).
• Dewey Decimal Classification - 722.7 - Roman architecture under ancient architecture.

1. Which of these identifiers and schemes hold for the sense of ancient Roman architecture this model covers, and on what evidence? provenance

Standards and regulation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Vitruvius, De architectura - circulating handbook of practice, not a statute (late Republic / Augustan).
• Imperial height limits on insulae: 70 Roman feet under Augustus, tightened to 60 under Trajan - Roman imperial edict.
• Cura aquarum (water board) as described by Frontinus, De aquaeductu urbis Romae - office of the Roman state.
• International Charter for the Conservation and Restoration of Monuments and Sites (Venice Charter, 1964) - ICOMOS.
• Convention Concerning the Protection of the World Cultural and Natural Heritage (1972) - UNESCO.
• Codice dei beni culturali e del paesaggio, Legislative Decree no. 42 of 22 January 2004 - Italian Republic (principal statute for fabric in Italy).
• EN 16096:2012, Conservation of cultural property - Condition survey and report of built cultural heritage - CEN.
• Nara Document on Authenticity (1994) - ICOMOS / UNESCO / Agency for Cultural Affairs (Japan).

1. Which of these standards and regulation hold for the sense of ancient Roman architecture this model covers, and on what evidence? provenance

Real-world use

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Standing monuments and excavated towns visited and managed as heritage (Rome, Ostia, Pompeii, Nîmes, Split, Trier, Jerash, Leptis Magna).
• Measured survey, conservation and anastylosis by state heritage agencies and archaeological superintendencies.
• Type-source for later Western civic architecture (Renaissance, Baroque, neoclassical, Beaux-Arts).
• Engineering case for long-life lime-pozzolana concrete and unreinforced vaulting.
• Urban reference for grid, insula block, and forum-centred colonial towns.
• Late-antique and medieval reuse as churches, forts and spolia (e.g. the Pantheon as Santa Maria ad Martyres).

1. Which of these real-world use hold for the sense of ancient Roman architecture this model covers, and on what evidence? provenance

Typical measurements

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Design module (pes monetalis, Roman foot) - 295-297 - mm
• Legal insula height after Augustan / Trajanic limits - 18-21 - m
• Clear span of monumental concrete vaults and domes - 6-43.3 - m
• Aqueduct specus gradient (built examples; Vitruvius asked for a steeper 0.5%) - 0.2-5 - m/km
• Amphitheatre seating (provincial house to the Colosseum) - 5000-50000 - persons
• Compressive strength of surviving land-core opus caementicium (published tests vary) - 5-25 - MPa

1. Which of these typical measurements hold for the sense of ancient Roman architecture this model covers, and on what evidence? provenance

Failure modes and hazards

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Collapse of unreinforced concrete vaults once facing, ribs or core decay.
• Delamination of brick or stone facing from the concrete core, accelerated by corroding iron clamps.
• Differential settlement on alluvial ground (notably the Roman floodplain).
• Seismic shear of walls, colonnades and unbonded cores.
• Fire in timber-floored insulae (a documented ancient urban hazard) and later fire damage to remaining timber and marble.
• Spoliation of marble, metal clamps and brick.
• Salt crystallisation, rising damp and freeze-thaw in buried or half-buried fabric.
• Hard cement pointing and reconstructions that trap moisture.
• Wear, vibration and crowding at high-tourism sites.

1. Which of these failure modes and hazards hold for the sense of ancient Roman architecture this model covers, and on what evidence? provenance

Regional variation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Central Italy from the first century CE: brick-faced concrete (opus testaceum / latericium) is the metropolitan signature.
• Western provinces: more ashlar in local limestone or sandstone; Gallo-Roman fanum temples and Romano-British villas with hypocausts.
• North Africa: opus africanum (upright orthostats with infill) and very large public baths in grid cities.
• Eastern Mediterranean: Greek marble trabeation continues beside Roman vaulting; large imperial complexes (e.g. Baalbek, Ephesus, Palmyra).
• Rhine and Britain: timber, tile and military architecture weigh more heavily in the surviving record.
• Labels: English 'Roman architecture' versus Italian architettura romana; hybrid period names Romano-British, Gallo-Roman, Hispano-Roman - not the same as medieval 'Romanesque'.

1. Which of these regional variation hold for the sense of ancient Roman architecture this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Ancient Greek architecture - Greek public architecture is predominantly trabeated post-and-lintel in cut stone; Roman work adds systematic concrete, the true arch/vault/dome, and a frontal podium temple rather than a peripteral one.
• Etruscan architecture - Etruscan temples use a high podium, deep porch and wooden superstructure (Tuscan order); Rome inherits that temple type but develops fired brick, pozzolanic concrete and arcuated spanning at urban scale.
• Byzantine architecture - Continues Roman vaulting into a church-centred programme; pendentive (and related) domes on centralized plans and a different liturgical type-set, from the 5th-6th centuries onward.
• Romanesque architecture - Medieval (roughly 10th-12th century) round-arched masonry, usually without Roman pozzolanic concrete; a later revival of arcuated massing, not imperial Roman building.
• Hellenistic architecture of the eastern Mediterranean - Shares orders and urban show façades with Rome; lacks the Italian concrete-vault kit unless a site is under Roman rule and uses it.
• Renaissance and neoclassical all'antica work - Later imitation of Roman orders and types in post-medieval materials and programmes; date, construction (rarely opus caementicium) and context separate it from ancient fabric.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of ancient Roman architecture this model covers, and on what evidence? provenance