You see a poem written by Martial about the Domus Flavia in 102 CE, after the emperor Trajan had opened the palace to Romans and dedicated its treasures to Jupiter. Click here for a translation.
Quidquid Parrhasia nitebat aula, donatum est oculis deisque nostris. Miratur Scythicas virentis auri flammas Iuppiter, et stupet superbi regis delicias gravesque luxus: Haec sunt pocula, quae decent Tonantem; haec sunt, quae Phrygium decent ministrum. Omnes cum Iove nunc sumus beati; at nuper pudet, a pudet fateri omnes cum Iove pauperes eramus.