What are the Fiqh academies and their headquarters, and what are some of the traditional Fiqh works?

Fiqh academies are legitimate scholarly institutions that research contemporary fiqh issues and emerging fiqh problems. The most prominent among them are the Islamic Research Academy, affiliated with Al-Azhar; the Islamic Fiqh Academy, affiliated with the Muslim World League; and the Fiqh Academy, which originated from the Organization of Islamic Cooperation. As for ancient fiqh literature, it is extensive and diverse, encompassing the fiqh of the four maddhabs and the Zahiri school.