This stamp is coming from the Landshut’s (Bavaria) district library for teachers, which has been created probably around the beginning of the 19th century. The mention in the middle of the stamp indicates that the book has been eliminated from this collection and is now integrated in the library for research on history of education in Berlin.
Compared to stamps of today, this one, with its oval form, is quite modern and could still be used today.
Pay attention to the hand-writing by an unknown librarian. He or she will now live forever.