Janus is usually shown bifrons, with two faces joined at the back of one head. Ovid's Janus compares this vision to a porter at a doorway who can see who enters and who leaves. Other readings connect the two directions with east and west or, in later reception, past and future.

The image can carry a psychological reflection, but the sculpture does not claim that Janus is "blind to himself." What it makes visible is a threshold's double address: every passage belongs to the space on each side.

Ancient authors describe the Janus Geminus at Rome as a shrine or gateway whose doors stood open in war and closed when peace had been achieved. Plutarch calls them the gates of war; Ovid imagines Janus closing them so that peace will not depart.

The ritual was rare enough to become politically charged, especially when rulers announced a closure. Ancient explanations differ, so the open doors should not be presented as proof that Janus had gone out to fight. They made the condition of the Roman state visible in the centre of the city.

The Latin month Ianuarius bears Janus's name. Roman stories associated the month and calendar changes with the legendary king Numa, while the civic year did not consistently begin in January until the Republic. Ovid later opens his Fasti by asking the two-faced god to explain the year's first month.

Our habit of looking backward and forward at New Year fits the image beautifully. It is a reception of Janus, not evidence that Romans moved the calendar from March in order to replace conquest with reflection.

Janus has no straightforward Greek counterpart, which made him especially useful to Roman authors thinking about their own religious inheritance. That does not make other Roman gods "copy-pasted" Greeks. Roman worship, names and institutions transformed even deities later identified across cultures.

Janus's place at doors and beginnings tells us something specific about Roman ritual: openings required attention. It does not justify calling an entire people obsessed with barbarism or casting the god as a cosmic border police officer.

Roman images and texts can give Janus a key and staff. In Ovid's poem, Janus calls the key his armament and names himself guardian of peace and doorways. The attributes connect him with opening, closing and passage.

Their symbolism need not expand into a theory of who or what deserves entry. A key is enough: a small object that makes a boundary conditional, sometimes open and sometimes closed.

The doors of Janus turned an abstraction into a public condition: open in war, closed in peace. Ancient writers counted closures differently and rulers used them to speak about their own reigns, so a single total is less reliable than the ritual contrast itself.

Janus does not prove that every ending is a beginning. He gives transition a face on each side. At an archive threshold, that remains a generous companion: memory looks toward what has been gathered; attention turns toward what has not yet arrived.