Janus Ornament: Symbolism in Architecture and Art

This entry sits within the Decorative and Applied Arts Encyclopedia, a master reference hub indexing design history, materials, movements, and practitioners.

Engraved two-faced head of Janus with related Roman coins and sculptural depictions in Bernard de Montfaucon’s antiquarian work. — Bernard de Montfaucon’s engraving of Janus and related ancient representations. The plate brings together profiles, coins and sculptural details in an antiquarian study of the Roman god. Public-domain image; source: Wikimedia Commons.

Janus ornament draws on a Roman god associated with doors, passages and beginnings. For more on the deity, see our overview of Janus. Artists often showed him with two faces turned in opposite directions. This image suited a god linked with entrances and transitions. Giovanni Battista Piranesi’s 1769 print offers a clear design example. It shows two chimneypieces, with Janus heads on the lintel of the larger. As a result, classical imagery enters an imagined eighteenth-century interior.

Janus Ornament in Roman Religion and Visual Culture

Roman writers connect Janus with beginnings, doors and passage. For example, in Ovid’s Fasti, he describes a door’s two fronts and compares himself to a porter. The porter watches those who enter and leave. In turn, this image helps explain the god’s double face. It looks both outward and inward, toward what has passed and what is about to begin.

January takes its name from Janus. Roman writers also linked the month with new beginnings. However, the two-faced image does not carry one fixed meaning. Roman religion changed through ritual, civic life and later interpretation. Depending on context, Janus could evoke beginnings, transitions, entrances or the passage of time.

Janus in Rome: The Shrine’s Open and Closed Doors

Janus also had a civic presence in the Forum. Livy describes the shrine of Janus Geminus, also called Janus Quirinus. Its doors stood open when Rome was at war and closed in peacetime. According to Livy, King Numa established the shrine as an “index” of peace and war. In addition, Augustus later cited its closure as evidence of peace in the empire. Thus, its doors carried both political and religious meaning.

These accounts help explain Janus ornament. However, they do not show that every Roman doorway or gateway displayed the god. Nor do they prove an unbroken decorative tradition from the shrine to later architecture. Instead, we should interpret an eighteenth-century Janus head through its object and documented setting.

Piranesi’s Janus Chimneypiece Design

Etching by Giovanni Battista Piranesi showing two chimney pieces with Janus heads, ornate classical motifs, and symmetrical architectural details. — An etching by Giovanni Battista Piranesi showcasing two chimney pieces. The larger features Janus heads on the lintel, surrounded by intricate classical decorations, while the smaller is rendered with detailed engravings below.

The Metropolitan Museum of Art catalogues the etching as Two Chimneypieces. Its full record describes Janus heads on the larger lintel and a smaller design on an attached sheet. Moreover, the museum dates the print to 1769 and identifies its medium as etching. Therefore, the article examines a documented print, not a general claim about the motif’s use in European interiors.

The print appears in Piranesi’s Diverse maniere d’adornare i cammini ed ogni altra parte degli edifizi, issued in Rome by Generoso Salomoni in 1769. In addition, the title describes designs for chimneypieces and other parts of buildings. It draws on Egyptian, Etruscan and Greek architecture. Meanwhile, the Rijksmuseum records 66 prints. Thus, Janus appears within a varied collection of architectural and interior ornament, not a book devoted solely to Roman antiquity.

Reading Piranesi’s Janus Chimneypiece

In the larger composition, Janus heads sit on the lintel above the fire opening. Their placement makes them part of the furnishing’s upper ornament. However, the print is an etching on paper, not a surviving marble chimneypiece. It records a design proposal; it does not prove the object was built or installed.

Piranesi uses the chimney surround as a frame for concentrated ornament. It gathers figures, mouldings and classical references around a functional opening. Consequently, the Janus heads make the lintel the design’s symbolic focus. This reading follows the visible composition and the museum’s description. To establish Piranesi’s precise intention, we would need evidence from his own text, a commission record or another contemporary source.

Janus Ornament and Eighteenth-Century Design

Piranesi’s print appeared amid renewed European interest in classical architecture and ornament. Yet it does not simply reproduce one archaeological model. Its title and the museum records point to a broad repertoire, including Egyptian, Etruscan, Greek and Roman references. The Janus chimneypiece offers one example of eighteenth-century designers adapting ancient imagery for contemporary interiors.

This distinction matters for design history. The print documents Janus heads, but does not show that Janus became a standard Rococo furniture motif. Nor does it prove that the Roentgen workshop adopted Piranesi’s design or that the print directly shaped later neoclassical objects. For that reason, such influence claims need object-specific evidence. For now, the etching offers a documented example of classical mythology in an eighteenth-century domestic design.

Janus ornament is best understood through symbol, placement and medium. Roman texts connect Janus with doors and civic thresholds. More than seventeen centuries later, Piranesi placed the god’s heads on a chimneypiece lintel. Ultimately, this design brings historical reference into a domestic setting. Still, interpretation must remain distinct from documented fact.