[Konstantin]

Сообщение от Dmitry N. ; 2082241"

I will try to improve, to formulate , as is done in the museum catalogs .

Here are the rules :

A . Author.
Two . Material and equipment manufacturing (paper , cardboard , paper , pastels , watercolors, lithographs , oil , pencil , etc.).
Three . Size ( horizontal x vertical for painting ).
4. Creation time ( 1899 /early. , Mid- twentieth century. , Etc.).
Five . Captions, labels , stamps, birochki (if you have - be sure the photo).
6. Condition ( breaks , debris , scrapes ).
7. Expert opinion (if any) - the organization name + expert.
Eight . High-quality photograph of the picture , the back of the picture , photo captions ( if any).
9. The origin of the picture.
10. Any other information useful to the attribution of the picture .

They are taken not from the ceiling.
If you really want to get an answer.