Applied carefully, High Dynamic Range-technique (HDR) can create incredibly beautiful pictures which blur our sense of the difference between reality and illusion. In graphics HDR imaging is a set of techniques that allow a far greater dynamic range of exposures than normal digital imaging techniques.
I'll admit, it's a best guess based on the available evidence. And, quite honestly, the museum is not in and of itself evidence of overwhelming nostalgia. But I do think when you look at the linguistic evidence - particularly their use of 1,500 year old sayings on their inscriptions, which is sorta like if politicians started randomly quoting Beowulf (which, now that I type it, sounds pretty awesome actually) - there's good evidence of this particular society having an unusually strong affinity for its past.
"We came to the sands of Acre, where we pitched camp, the King [Louis IX] and the host. Thither in that place came to me a troop of many people from Great Armenia, that were going on pilgrimage to Jerusalem … By an interpreter … they begged me that I would show them the saintly King. I went to the King where he sat in a pavilion, leaning against the pole of the pavilion … I said to him: 'Sir, there is without a band of many folk from Great Armenia, that are going to Jerusalem,...
Perhaps as long as 5,000 years ago, a group of sailors found skulls belonging to a race of hideous giants whom the ancient Greeks named cyclops. Dwelling in their mythical land, entrusting the fate of their crops to their evil gods and devouring any humans they could find, these creatures terrified generations of Europeans.