The Velia — or Velian Hill or Velian Ridge — is a saddle or spur stretching out from the middle of the north side of the Palatine Hill towards the Oppian Hill (itself a spur of the Esquiline Hill) in Rome.
In later times, the Velia was called Summa Sacra Via ("Summit of the Sacra Via") — since that road began there at its highest point — and was marked by the Arch of Titus and Temple of Venus and Roma. (An alternate theory is that the Velia was actually the eastern half of the Palatine).
The Septimontium was a proto-urban festival celebrated in ancient Rome by montani, residents of the seven (sept-) communities associated with the hills or peaks of Rome (montes): Oppius, Palatium, Velia, Fagutal, Cermalus, Caelius, and Cispius. The Septimontium was celebrated in September, or, according to later calendars, on 11 December. It was not a public festival in the sense of feriae populi, according to Varro, who sees it as an urban analog to the rural Paganalia.
The etymology from septem ("seven") has been doubted; the festival may instead take its name from saept-, "divided," in the sense of "partitioned off, palisaded." The montes include two divisions of the Palatine Hill and three of the Esquiline Hill, among the traditional "seven hills of Rome".
The Oppian Hill (Latin, Oppius Mons; Italian: Colle Oppio) is the southern spur of the Esquiline Hill, one of the Seven hills of Rome, Italy. It is separated from the Cispius on the north by the valley of the Suburra, and from the Caelian Hill on the south by the valley of the Colosseum. The Oppius and the Cispius together form the Esquiline plateau just inside the line of the Servian Wall.
In the divisions of the Septimontium (seven hills) Fagutal appears as an independent locality, which implies that originally "Oppius" was strictly applied to this spur except the western end. The northern tip of this western end was also called Carinae, which extended between the Velian Hill and the Clivus Pullius, looked out to the southwest (across the swamps of the Palus Ceroliae towards the Aventine), incorporated the Fagutal and was one of ancient Rome's most exclusive neighborhoods.
The Temple of Venus and Roma (Latin: Aedes Veneris et Romae) is thought to have been the largest temple in Ancient Rome. Located on the Velian Hill, between the eastern edge of the Forum Romanum and the Colosseum, it was dedicated to the goddesses Venus Felix ("Venus the Bringer of Good Fortune") and Roma Aeterna ("Eternal Rome").
The building was the creation of the emperor Hadrian and construction began in 121. It was officially inaugurated by Hadrian in 135, and finished in 141 under Antoninus Pius. Damaged by fire in 307, it was restored with alterations by the emperor Maxentius.