Guido Panciroli or Pancirolli[a] (17 April 1523 – 5 March 1599) was a sixteenth-century Italian antiquarian, historian, jurist and law professor at Ferrara, Padua and Turin.

[3] Posthumously, he was well known for his innovative comparative survey, Rerum memorabilium, iam olim deperditarum, that brought attention to the loss of knowledge since the ancient world.

[2] He was patronized by the Duke of Savoy, Emmanuel Philibert, teaching in civil law and receiving a very healthy salary of 1000 scudi.

Aside from the Rerum memorabilium, Panciroli's De claris legum interpretibus libri quatuor was an influential and ambitious early history of classical and medieval jurisprudence.

This had a great influential on Renaissance writers as it inspired a rebirth of study into classical works of technology and science, rediscovering this deperdita, in opposition to the Medieval focus on ancient philosophy.