Bomb found at my hotel

possibly some quack collector? Maybe somebody was thinking of it as the souvenir Kind and not the exploding kind?

Also unnerving but would explain why he doesn’t think it’s an act of terror.
It's plausible until you really begin thinking about the tricky, extremely dangerous, and frankly stupid logistics behind some quack WWII rare-arms collector (who's also somehow some IED expert or has some experience handling extremely sensitive bomb ordinances) that found this unexploded, near-80 year old bomb and somehow, moved it to try and sell it or set if off somewhere? Like I said, whether its 75-80 year-old bombs, explosives, and munitions scattered all over various, disparate regions, sections of German cities, public parks, supermarkets, parking lots, strasses (streets), stadts, platzs, as well as millions of bombs, grenades, ordinances still remain undiscovered, unearthed, and perhaps will continue to kill or maim farmers, rural civilians and UN, EU bomb/IED explosion experts living in northeastern France, parts of western Belgium, Flanders region for decades to come.

There's a far greater chance this idiot quack collector would blow himself (and other unfortunates) who happened to be in his vicinity foraging, finding and analyzing unexploded, highly unstable live munitions that failed to be explode after being dropped from Allied bombers 80 years ago