Domus Augustana on the Palatine hill, western part of the Imperial Palace ruins with Temple of Apollo Palatinus, Circus Maximus in valley below, Food and Agriculture Organization of the United Nations in background.

Domus Augustana on the Palatine hill, western part of the Imperial Palace ruins with Temple of Apollo Palatinus, Circus Maximus in valley below, Food and Agriculture Organization of the United Nations in background.

La Domus Augustana (o Augustiana) era la parte "privata" del palazzo di Domiziano sul colle Palatino. Fu la seconda ad essere costruita e corrisponde alla metà est del complesso. L'altra metà, di poco più antica, è occupata dalla Domus Flavia, la zona pubblica destinata alle funzioni ufficiali dell'imperatore, mentre sul lato est si trova lo Stadio palatino.

The Temple of Apollo Palatinus (Palatine Apollo) was a temple on the Palatine Hill of ancient Rome, which was first dedicated by Augustus to his patron god Apollo. It was only the second temple in Rome dedicated to the god, after the Temple of Apollo Sosianus. It was sited next to the Temple of Cybele. It was vowed by Octavian in return for the victory over Sextus Pompeius at the Battle of Naulochus in 36 BC and over Mark Antony and Cleopatra at the Battle of Actium 31 BC, and was built on a site where a lightning bolt had struck the interior of Augustus' property on the Palatine. It was dedicated on October 9 of 28 BC. The ludi saeculares, reinstituted by Augustus in 17 BC and also largely developed and funded by him, involved the new temple.
Augustus' private house was directly connected to the terrace of the sanctuary via frescoed halls and corridors. This tight connection between the sanctuary and the house of the princeps, both dominating the Circus Maximus, repeated a trope already present in royal palaces of Hellenistic dynasties.

The Circus Maximus (Latin for greatest or largest circus, in Italian Circo Massimo) is an ancient Roman chariot racing stadium and mass entertainment venue located in Rome, Italy. Situated in the valley between the Aventine and Palatine hills, it was the first and largest stadium in ancient Rome and its later Empire. It measured 621 m in length and 118 m in width, and could accommodate over 150,000 spectators. In its fully developed form, it became the model for circuses throughout the Roman Empire. The site is now a public park.
The Circus was Rome's largest venue for ludi, public games connected to Roman religious festivals. Ludi were sponsored by leading Romans or the Roman state for the benefit of the Roman people (populus Romanus) and gods. Most were held annually or at annual intervals on the Roman calendar. Others might be given to fulfill a religious vow, such as the games in celebration of a triumph. The earliest known triumph ludi at the Circus were vowed by Tarquin the Proud to Jupiter in the late Regal era for his victory over Pometia.
With the advent of Christianity as the official religion of the Empire, ludi gradually fell out of favour. The last known beast-hunt at the Circus Maximus took place in 523, and the last known races there were held by Totila, the penultimate King of the Ostrogoths, in 549.

more on http://www.roma-antiqua.de/bild?img=karte.jpg&path=/antikes_rom/palatin/karten/&q=Plattner%201904&r=domus_flavia_augustana_stadion.php&m=1 , http://www.roma-antiqua.de/antikes_rom/palatin/domus_flavia_augustana_stadion , https://it.wikipedia.org/wiki/Domus_Augustana , https://en.wikipedia.org/wiki/Temple_of_Apollo_Palatinus , https://en.wikipedia.org/wiki/Circus_Maximus