محمد باقر المجلسي (Muhammad Baqir al-Majlisi) was a prominent Shia Islamic scholar and theologian from the 17th century. He was born in 1627 in Isfahan, Persia, and is best known for his extensive writings on Shia beliefs and practices. His most notable work is Bihar al-Anwar, a comprehensive collection of hadiths (sayings of the Prophet Muhammad and the Imams) that covers various aspects of Islamic teachings. Al-Majlisi played a significant role in the development of Shia thought and education during his time. He served as a leading cleric and was influential in the establishment of religious institutions in Isfahan. His contributions helped shape the understanding of Shia Islam and continue to be referenced by scholars and followers today.