[1] For a medieval person primarily known through his scholarly writing, it is highly unusual that Johannes de Muris’ life can be traced enough to form a decently consistent biography.
Born in Normandy, he is believed to have been related to Julian des Murs who was secretary to Charles V of France.
During this time it is believed that he travelled freely, making trips to the town of Bernay to observe the solar eclipse of 1321.
[2] Much of his writings were finished in the early decades of his life with a major gap in activity that can be filled with astronomical observations.
Many of the surviving manuscripts of these treatises are from the 15th century and of Italian origin, suggesting his wide influence both geographical and temporal.