Francesco Lismanini (c. 1504 – April 1566) was an Italian Franciscan friar of Greek origin, who converted to Calvinism and also a Protestant reformer.
His Greek parents soon moved to Italy and in 1515 the family arrived in Kraków, Poland, where in 1525, Francis became a Franciscan friar.
In 1540, he was elected as a Franciscan Father, but as a humanist of the Erasmian circle and proponent of reformed doctrines, in 1550 he was suspected of heresy during a trip to Italy.
He tried to reach an agreement with the anti-Trinitarian church of the Polish Brethren to strengthen the Reform movement, but due to the opposition of Calvin and Bullinger, the attempt failed.
Thus in the late 1550s he was involved with numerous Calvinist and Lutheran disputes with people such as Francesco Stancaro.