The legend of a long-hidden Masonic treasure has caused much speculation over years, and even inspired a big budget Hollywood movie. But there was at least one real-life Masonic treasure, the story of which is just as interesting and tragic as anything movie writers could dream up: The large collection of Masonic items the Nazis looted from Masonic lodges during World War II.
Contrary to what some conspiracy theorists say, the Nazis were in no way affiliated with Freemasonry. In fact, they actively oppressed German Freemasons by arresting Masonic officers and looting valuable Masonic regalia, jewels and historic records from the lodge halls.
Fearing for their safety, German Freemasons suspended the work of the Craft. In a subtle act of solidarity, they often planted or wore forget-me-not flowers as a reminder to their Brethren that the Craft was still alive and awaiting a time when it could again flourish. As a result, forget-me-nots are a universally recognized symbol of Freemasonry.

forget-me-nots
World War II eventually ended, of course, and Freemasons were again able to practice the Craft in Germany. But for years, the stolen Masonic valuables were missing. That is, until researchers discovered the treasure in Russia where it had languished in archives for more than 60 years. To read more about how the treasure was stolen, discovered and returned to its rightful owners, check out this article.

Excuse me but the the real story of forget-me-not is slightly different: see
ÉTUDES MAÇONNIQUES – MASONIC PAPERS
by W.Bro. ALAIN BERNHEIM 33°
“THE BLUE FORGET-ME-NOT”
ANOTHER SIDE OF THE STORY
http://www.freemasons-freemasonry.com/bernheim3.html
and see:
The “Forget Me Not” Pin and Freemasonry by Paul M. Bessel
http://www.bessel.org/forgnot.htm
Lalo