Vidus Vidius born Guido Guidi, was an Italian surgeon and anatomist. His father was a physician and his mother was the daughter of the painter Domenico Ghirlandajo.

After practicing at Florence

Florence

Florence is the capital city of the Italian region of Tuscany and of the province of Florence. It is the most populous city in Tuscany, with approximately 370,000 inhabitants, expanding to over 1.5 million in the metropolitan area....

 and Rome

Rome

Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

 in Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

, he was invited by Francis I of France

Francis I of France

Francis I was King of France from 1515 until his death. During his reign, huge cultural changes took place in France and he has been called France's original Renaissance monarch...

 to come to Paris to be a personal doctor and teach at the Collège de France

Collège de France

The Collège de France is a higher education and research establishment located in Paris, France, in the 5th arrondissement, or Latin Quarter, across the street from the historical campus of La Sorbonne at the intersection of Rue Saint-Jacques and Rue des Écoles...

. While in Paris, Guido Guidi befriended artist Benvenuto Cellini

Benvenuto Cellini

Benvenuto Cellini was an Italian goldsmith, sculptor, painter, soldier and musician, who also wrote a famous autobiography. He was one of the most important artists of Mannerism.-Youth:...

 and published a book on surgery, Chirurgia, in 1544. This book was one of the best illustrated at the time and was based on works of Hippocrates

Hippocrates

Hippocrates of Cos or Hippokrates of Kos was an ancient Greek physician of the Age of Pericles , and is considered one of the most outstanding figures in the history of medicine...

, Galen

Galen

Aelius Galenus or Claudius Galenus , better known as Galen of Pergamon , was a prominent Roman physician, surgeon and philosopher...

, and Oribasius

Oribasius

Oribasius or Oreibasius was a Greek medical writer and the personal physician of the Roman emperor Julian the Apostate. He studied at Alexandria under physician Zeno of Cyprus before joining Julian's retinue. He was involved in Julian's coronation in 361, and remained with the emperor until...

.

In 1557, Guidi returned to Italy to become the personal physician of Cosimo di Medici and taught at Pisa

Pisa

Pisa is a city in Tuscany, Central Italy, on the right bank of the mouth of the River Arno on the Tyrrhenian Sea. It is the capital city of the Province of Pisa...

. He took holy orders and was ennobled. A book on medicine, incomplete at his death in 1569, was finished by his nephew as Ars Medicinalis between 1596 and 1611.