According to legend, the Viminal hill was named for the osiers (vimina), or willow trees, that grew there. [2]

The Viminal was the smallest and the least important of the traditional hills of Rome. It contained few monuments, and traffic typically passed on either side of it. [2]

The hill is separated from the Quirinal on the northwest by low ground and from the Cispius portion of the Esquiline on the southeast by a valley. [2]

Historians believe the settlement of the Tiber valley began sometime about 1000 BC, when an outbreak of volcanic eruptions in the Alban hills to the south forced the Latin tribes down into the lowlands. [8]

Servius Tullius (the sixth king of Rome) was responsible for adding the Viminal to the city of Rome within the Servian wall. [2]

When the Servian wall was built, the Viminal seems to have been regarded as reaching across the plateau as far as the line of the wall and the Porta Viminalis. [2]

The Viminal is a finger-shaped cusp of land that points toward central Rome. [1]

It is about 700 meters in length, 60 acres in area, and 55 meters in height. [2]

The hill was regularly called collis, not mons, and its inhabitants were called collini rather than montani. [2]

The majority of those who lived on the Viminal resided in apartment blocks called insulae. [9]

The principal open space in this region was the campus Viminalis sub aggere, which lay between the castra Praetoria and the Servian agger, the district traversed by the vicus collis Viminalis. The northern part of this campus was afterward used as a drill ground by the praetorian cohorts. [3]

Two buildings are mentioned in the Regionary Catalogue, which also designated localities, perhaps open squares. These were the Gallinae Albae and the Decem Tabernae, the latter plainly a sort of bazaar. Both were on the south part of the Viminal. [7]

The Gallinae Albae was probably a street or district on the western part of the Viminal. [9]

The baths erected by Diocletian were on the high ground to the northeast of the Viminal. [6]

Two Argei shrines were located on the ridge of the Viminal, one at each end. [5]

The vicus Longus crossed the valley between the Quirinal and the Viminal and connected to the Alta Semita inside the Colline gate. [4]

The vicus Patricius traversed the Subura in the valley between the Viminal and the Esquiline. [4]

The vicus collis Viminalis was a third street that ran in the same general direction along the top of the ridge to the Viminal gate. [4]

1. Wikipedia, Viminal Hill
2. Platner, A Topographical Dictionary of Ancient Rome, Viminalis Collis
3. Platner, A Topographical Dictionary of Ancient Rome, Campi
4. Platner, A Topographical Dictionary of Ancient Rome, Vici
5. Platner, A Topographical Dictionary of Ancient Rome, Shrines of the Argei
6. Platner, A Topographical Dictionary of Ancient Rome, Baths of Diocletian
7. Platner, The Topography and Monuments of Ancient Rome, Chapter XIX The Quirinal and Viminal   Region VI, pp. 462-484
8. Facaros and Pauls, Italy, pp. 843-847
9. The Regionaries Curiosum and Noticia Regio 6 - Alta Semita