This observation comes from Laura Antonucci, who has guided at Ostia Antica for over a decade.

“There are only a handful of statues standing outdoors in the archaeological site, and almost everyone assumes they are the originals. They are all casts. The originals are protected in the museum nearby, and many visitors never realise it.”

The assumption is understandable.

A statue standing in a Roman street, in a Roman town, surrounded by ancient walls and mosaics, looks as though it belongs there in the most literal possible sense.

And in one sense, it does.

The position may be historically meaningful even when the object standing in it is not the ancient original.

Where the originals went

Inside the archaeological park is the Ostiense Museum, housed within the historic Casone del Sale.

Here the relationship between the site and its sculpture becomes clearer. Ancient works that require protection can be conserved indoors while casts or replacement displays preserve part of their relationship with the buildings and spaces from which they came.

The reason is conservation rather than spectacle.

Marble left permanently outdoors is exposed to rain, biological growth, pollution, temperature changes and, at Ostia, an environment shaped by its proximity to the coast.

A surface that survived for centuries can continue deteriorating once excavation exposes it again to the open air.

The older reason

Ostia had already lost sculpture long before modern conservation policies existed.

Early excavations were conducted in a world very different from modern archaeology. Ancient sculpture could be valued primarily as an art object: something to recover, restore, collect and move.

Statues and fragments left archaeological sites for collections in Rome and elsewhere in Europe. In earlier centuries, the priority was often the object itself rather than the archaeological context in which it had been found.

Modern archaeology asks a different question.

A statue matters not only because of what it depicts or how beautifully it was carved, but because of where it stood, what surrounded it and how an ancient visitor would have encountered it.

A copy can preserve information

This is the useful paradox.

A cast is not the ancient work. It does not preserve the original marble, the ancient tool marks or the physical surface that survived from antiquity.

But returning a cast to an archaeological setting can restore another kind of information: the relationship between sculpture and place.

Seen this way, the copy is not pretending to replace the original.

It is helping the visitor reconstruct something a museum display cannot reproduce completely.

What to look at

If possible, do the museum before finishing the archaeological site.

Most visitors instinctively do the opposite. They spend hours among streets, baths, houses and temples and leave the museum until the end, when attention is already disappearing.

Reverse the order.

Look closely at the sculpture indoors. Notice the marble, the surviving ancient surface and the details that can only be understood when you are standing in front of the original object.

Then return to the archaeological landscape.

The two encounters explain different things.

The museum tells you what the object is.

The archaeological site tells you where an object like it belonged.

The statues standing outdoors at Ostia Antica are copies, but that does not make them meaningless. They mark places where sculpture once formed part of the city — preserving a piece of information that a museum display, however extraordinary, can never fully give you.