Not anymore. Cell phone leak.
Google 'em.
My thoughts exactly.
Ho Chi Minh’s preserved body in Hanoi. I went in college, you get shuffled through the mausoleum really quickly, no pics allowed. Very bizarre.
Wikipedia:
"Ho Chi Minh’s body is preserved in the cooled, central hall of the mausoleum, which is protected by a military honour guard. The body lies in a glass case with dim lights. The mausoleum is closed occasionally while work is done to restore and preserve the body but is normally open daily from 9:00 am to noon to the public. Lines of visitors, including visiting foreign dignitaries, pay their respects at the mausoleum. Rules regarding dress and behavior are strictly enforced by staff and guards. Legs must be covered (no shorts or miniskirts). Visitors must be silent, and walk in two lines. Hands must not be in pockets, nor arms crossed. Smoking, photography, and video taping are also not permitted anywhere inside the mausoleum. "
Allah be praised.
As mentioned earlier, we saw him last year. Yes, the guards are very strict. Without thinking about it, my wife put her left arm slightly behind her and was immediately told not to do that. It’s arms straight down at the sides the whole time you’re in there. Not much chance to sneak a secret photo.
Some government document, that’s secret as in classified as such, but we’re sure it exists.
Nuclear launch codes? Do such things exist on paper? I just pulled the phrase out of my head 
No, you don’t actually ‘see’ them.
In that they do not travel thru the optic nerves from your eyes to your brain. Things in dreams are merely imaginary objects, created and interpreted entirely within the brain itself. They are more accurately considered hallucinations than objects that you have seen.
I don’t think imaginary objects count for the OP’s question.
I’m sure, though I haven’t googled it, that professional photographers with the right equipment, that is, a tripod for long exposure and a special film, have been allowed to take photos which are then sold, because that’s what museums elsewhere do, catching two flys at once: protecting the sensitive objects from flash light damage and making a bit of money by selling the postcards and photos.
During the Expo 2000 in Hannover, one project was a chamber underground only accessible through a water-filled tunnel connected to a deep hole, so any visitors needed to be able to dive 5 m deep (the chamber itself was filled with breathable gas). I couldn’t equalize well enough (lack of training) to get down 5 m (esp. as it was completely dark - weird feeling) so I still don’t know what exactly they showed. Some reports afterwards hinted that the mixture of air in the chamber was not the normal mixture, but with some other gases mixed in that produced a very slight hallucigenic effect, making the pictures/ movies viewed seem much more impressive than outside.
I’ve been to the exposition, but did not see this. The Expo-Journal in its last issue (page 13; article in German), however, reported that there was nothing down there after all, just a small, empty space with blue plastic walls. There’s no mention of any gases.
The linked article states that no photos were taken, but the OP calls for an “object”, so I’m not sure if this is eligible.
Semantics.
Arguably we don’t “see” colour either: it’s something our brain generates; usually, but not always, coupled to external stimuli.
I agree that it doesn’t work for the OP though.
I’ll reassert that Kim Il Sung’s mummy is still winning the thread. That picture is definitely Mao, upon closer inspection.