Giorgio Blandrata, an Italian Unitarian, born in the marquisate of Saluzzo, Piedmont, about 1515, died in Transvlvania about 1590. He at first practised medicine in Pavia, but having embraced anti-Trinitarian doctrines was compelled to leave Italy, and became physician to the wife of King Sigismund Augustus of Poland. Returning to Italy, he was thrown into prison, but escaped and took refuge at Geneva. Finding himself nearly as obnoxious to the Calvinists as to the Roman Catholics, he returned to Poland. There, although Calvin warned the people against him, he acquired great influence. Prince Radziwill sent him as plenipotentiary to the synod of Pinczow in 1561. Two years after this he accepted an invitation to become physician to John Sigismund, prince of Transylvania. Here he made many converts, including the prince and court; and at a diet held in 1571 at Maros-Vasarhely, Unitarianism was legally recognized as one of the religions of the land. After the death of John Sigismund he was physician to Stephen and Christopher Bathori, the rank of privy councillor being conferred upon him after Stephen's accession to the throne of Poland, in promoting which he was very active.

Stephen was not favorable to his doctrines, and it is said that for the purpose of advancing his interests with the king he gave them up. At all events he succeeded in accumulating a large fortune, and his nephew strangled him in bed for the purpose of securing it. His collected works, in Latin, were published by Henke (Helmstadt, 1794).