This is the 12544th most frequent Polish word.
napisany
"Written."
Finally, "napisany" is used to qualify the document, specifying that it was written earlier.
Chcę przeczytać dokument napisany wcześniej.
I want to read the document written earlier.
Here, "napisany" is used as a past participle in the passive voice to indicate something written.
Ten tekst został napisany w zeszłym roku.
This text was written last year.
In this instance, "napisany" describes the state of the letter being written by Jan, serving as an adjective.