I. The Quran is the central religious text of Islam that was revealed to the Prophet Muhammad over 23 years. It contains the religious teachings and laws that guide Muslims.
II. The Quran was revealed in two periods - the Makki revelations that came in Makkah focusing on core beliefs and ethics, and the Madani revelations in Madinah addressing practical laws and governance issues.
III. The compilation of the Quran began under Caliph Abu Bakr who commissioned Zayd ibn Thabit to collect the revelations from memories and materials into a single volume, establishing the final authoritative text.