When Russian troops entered in Paris (1813) under the guidance of the Alexandr I , they obviously had to eat somewhere. So, they entered in the ordinary caffe ( or something like this) and demanded strongly - "bistro , bistro " ( it means: faster , faster in Russian ) .
They wanted to eat as soon as possible.
From that time the ordinary small cafees in Paris have got the new name: Bistro
It is quite interesting that the famous French thing has the russian origin.
In order to make her position and situation more comphortable in new France ex-wife of Napoleon - Jozephine , gave as the present to Alexandr her Malmaison Art collection . She hope that the Alexandr will fall in love with you, but he did not.
He took with thanks the collection with him and put it in the Hermitage.
So, we can see the pictures from Malmaison collection in the Hermitage.
Anyway, the calculation of the Jozephine was right.
She was not hurt.