We are at the end of chapter 43 and we find Gibbon in full on enlightenment mode. The reign of Justinian happened to coincide with a couple of comets, some significant earthquakes and a major plague. Previous ages would have agreed with the Byzantines themselves and taken these as communications from God but Gibbon is a modern man and instead gives us the science. The plague was probably the biggest event in history since the fall of the western empire and had profound effects many of which are still being unpicked today.
We have given a lot of attention to the campaigns of Belisarius, especially those in Italy. Gibbon covers it all in sumptuous detail. I think we can assume that the court in Constantinople did as well. Big events like the recapture of Rome and Ravenna are bound to be seen as important and significant.
The largest man-made enclosed space in the world is the Pentagon. The United States is a big country, with a big opinion of itself and which asserts that it has an important mission. Their defence headquarters is not just somewhere to keep their photocopy paper. It is a building that is meant to impress.