Al-Mu'tadid bans philosophers' bookstalls and street storytellers and astrologers

In the first year of his caliphate, al-Mu'tadid forbade the booksellers to sell the books of the philosophers and the like, and forbade the storytellers and astrologers to sit in the street. ²

Al-Suyuti quotes al-Suli that he ordered that no astrologer or storyteller sit in the street, and made the booksellers swear not to sell the books of philosophy and dialectic. ²

The year 279 AH is derived, and the date needs a second source.