Deletion of The signed letter of Muhammad al-Mahdi (Tawqee)

Comment: One article consist several part and all these parts are for clearing the subject. Therefore, we can not just write about subject and this is necessary write some introduction. In this article, history section is introduction and another parts are main text. '''Tawqee''' is signature of Caliph or rulers on the letter and the article is about '''Muhammad al-Mahdi's Tawqee'''. In references of the article, the letters were introduced that Muhammad al-Mahdi signed (for example https://books.google.com/books?id=03nogx42JPYC&pg=PA55#v=onepage&q=signed%20&f=false this one and https://books.google.com/books?id=kqARXtWCrWEC&pg=PA28#v=onepage&q=signed&f=false this). Please pay attention that according to , ''popularity is not notability''. You can ask your question about Muhammad al-Mahdi and related topics to him from
Stance: keep
Cited policy: Wikipedia:Notability (WP:N)