Marcello Squarcialupi (Piombino c. 1538-Alba Iulia 1599) was an Italian physician, astronomer, and Protestant exile in Basel, then a Unitarian exile in Transylvania. His works included De cometis dissertationes novae clarissimae (New Clear Essays On Comets) Basel, 1580. From Poschiavo, 1587, he wrote to the Senate in Alba Iulia, though it is uncertain whether the letter was ever delivered. References 1530s births 1599 deaths 16th-century Italian astronomers Italian Unitarians Unitarian Church of Transylvania