Giovanni Fontana, also known as Johannes de Fontana (c. 1395 – c. 1455), was a fifteenth-century Italian physician and engineer. He was born in Venice in the 1390s and attended the University of Padua, where he received his degree in arts in 1418 and his degree in medicine in 1421. University records list him as "Master John, son of Michael de la Fontana". His most famous promoter at the university was the scholastic Paul of Venice. He tells us that the Doge of Venice sent him to Brescia to deliver a message to the condottiere Francesco Carmagnola. He was also employed as the municipal physician by the city of Udine.
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