Roman Mosaicist created structural art using 'pixels' of marble. Some were functional and plain, some with standard geometric patterns while others were no less than works of art.

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Aedificium

Latin term for a building or structure. Relevant because Roman mosaics were not simply decoration but integrated architectural elements.

Bedding Layer

The mortar layer into which tesserae were pressed during installation. Roman mosaicists needed to judge moisture content carefully to achieve proper adhesion and alignment.

Cubiculum

A Roman bedroom or private chamber in a house or villa. Some contained geometric mosaics.

Domus

An elite Roman urban house, often decorated with wall paintings and mosaic floors.

Emblema (plural: emblemata)

A detailed central mosaic panel, often pictorial and sometimes made separately in a workshop before installation on site. These often depicted mythology, theatre scenes, animals, or marine life.

Lime Mortar

Mortar made with lime and aggregates such as sand or crushed ceramics. Used in the layered construction beneath mosaics.

Musivarius

A Roman mosaic specialist, although the term more often appears in Late Roman and Byzantine sources and may sometimes refer to wall and vault mosaics as well as floors.

Opus Musivum

A Latin term associated with mosaic work, especially decorative mosaic surfaces.

Opus Signinum

A waterproof floor material made from crushed ceramic (usually tile) mixed with lime mortar. Often used as a subfloor beneath mosaics or as a finished floor in less wealthy buildings.

Opus Tessellatum

The most common Roman mosaic technique, using relatively standard-sized tesserae to create images or patterns.

Opus Vermiculatum

A highly detailed mosaic technique using very small tesserae, especially for central pictorial panels (emblemata). The name refers to the worm-like flowing lines created around figures.

Patron / Client Relationship

Roman building and decorative work often operated through patronage. Wealthy property owners commissioned artisan teams for decorative programmes.

Pavimentum

Latin for a paved floor. Could refer to stone paving, mortar floors, or mosaic surfaces.

Pozzolana

Volcanic ash that could create hydraulic mortar when mixed with lime. More common in Italy than Britain, but important in Roman mortar technology generally. 

Roman Villa

A rural elite residence. Villas in Britain frequently contained mosaics, especially dining rooms (triclinia) and bath suites.

Statumen

The lowest structural layer beneath a Roman floor, typically compacted stone.

Rudus

A compacted layer of coarse mortar and rubble placed above the statumen.

Nucleus

A finer mortar layer placed beneath the visible mosaic surface, providing an even bed for tesserae.

Tessella / Tesserae

Small pieces of stone, ceramic, glass, or marble used to create mosaics. Although often called “mosaic tiles” today, they are not tiles in the modern sense.

Tessellarius

A mosaic worker or installer, often associated specifically with floor mosaics.

Triclinium

A Roman dining room. Wealthy triclinia frequently had elaborate mosaics intended to impress guests.

Workshop (Officina)

An artisan working group. Mosaic workshops likely included designers, stone cutters, apprentices, mortar labourers, and senior installers.

Sources:

Adam Rogers (2015). The Archaeology of Roman Britain: Biography and Identity. London: Routledge.  

David S. Neal (1981). Roman Mosaics in Britain. London: Society for the Promotion of Roman Studies.

David S. Neal and Stephen R. Cosh (2002–2010). Roman Mosaics of Britain. 4 vols. London: Society for the Promotion of Roman Studies.

Roger Ling (1998). Ancient Mosaics. London: British Museum Press.

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