The one that can be seen in the centre of the picture is the Aqua Claudia. This public work is one
of the most remarkable of Rome. Terminated under Emperor Claudius, it fed the slopes of the
Palatine (top left) and had its source in the moutains 68km far from Rome.
In the centre of the picture, it goes through the Cælian Hill and, in the middle,
along the wide architectural complex formed by the Temple of Claudius.
The Emperor Domitian extended the Aqua Claudia up to the Palatine, top right, to supply the palace with water.
Detail of the Aqua Claudia
going through the Cælian Hill.
The Aqua Claudia had as well to wind amid the mansions of the Cælian Hill.
This aqueduct in the centre of the picture is actually a double aqueduct,
on the left and the Marcia
on the right. The Aqua Appia diverts directly
from the Aqua Claudia which we saw above, meanwhile the Aqua Marcia had its source
in the big Aqua Marcia Tepula Iulia, that fed the Baths of Diocletian.
These two aqueducts
went therefore through the Cælian Hill and fed the
baths built on the Aventine, the Baths of Decius on the upper part of the hill
and the smaller Baths of Sura towards the Circus Maximus.
Opposite the indication as to where the Aqua Alsietina
goes underneath to supply with water the Naumachia of Augustus in the Trastevere.
The aqua Virgo
enters Rome on the north side through the slopes of the Pincian
Hill and goes until the Sæpta Julia on the Campus Martius.
On the picture, you see the Arch of Claudius on the spot where the aqueduct goes
over the Via Lata, completely on the left of the picture.
Today this is the famous Via del Corso.
A partial view of the Aqua Virgo, just before it bends, at the top of the picture, towards the Campus Martius.
The Aqua Marcia Antoniniana
is supplying the great cistern of the Baths of Caracalla.
Third Roman aqueduct, the Aqua Marcia Tepula Iulia
was built between 144 and 140 BC.
It enters Rome through the Prænestina gate (today the Porta Maggiore – the Main Gate), goes alongside the Aurelian Wall to the Tiburtina Gate then comes into the city and divides in two separate branches.
Here is the division of the two branches of the Aqua Marcia in the north-east Esquiline. The shortest is the Aqua Marcia Iovia.
The two branches feed the tanks of the Baths of Diocletian, becoming underground.
The New Anio Aqueduct ( Aqua Anio Novus )
merges with the Aqua Claudia, with which it shares the same way on their 13 last kilometres before Rome.
It diverges from it after the Prænestina Gate and feeds a great tank (Aqua conclusa
This was the longest and the one that brought the most water to Rome.