What is the difference between the House of Wisdom and the House of Wisdom?

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1- What is the difference between the House of Wisdom and the House of Wisdom? Which one is the product of the Abbasids?

2- Who is Al-Mansur bin Al-Hussein Al-Hallaj, and how was his end? And why?

3- It is said that heresy appeared in the Abbasid era? What is it?