Guido III da Polenta

{{Short description|Lord of Ravenna, Italy (born 1359)}}

{{about|the 14th century lord of Ravenna|the 9th century Duke of Spoleto|Guy III of Spoleto}}

Guido III da Polenta (died 1389) was a lord of Ravenna, Italy and a member of the da Polenta family.{{Cite journal |last=Haye |first=Thomas |date=2016-04-11 |title=Giovanni Manzini della Motta (ca. 1362–vor 1422): Metamorphosen spätmittelalterlich-humanistischer Geschichtsschreibung (mit Edition) |url=https://www.degruyter.com/document/doi/10.1515/qfiab-2015-0006/html |journal=Quellen und Forschungen aus Italienischen Archiven und Bibliotheken |language=de |volume=95 |issue=1 |pages=110–134 |doi=10.1515/qfiab-2015-0006 |issn=1865-8865}}{{Cite web |title=Polenta Family {{!}} Italian family {{!}} Britannica |url=https://www.britannica.com/topic/Polenta-family |access-date=2023-02-24 |website=www.britannica.com |language=en}}

He peacefully held the city's government for 30 years after the death of his father, Bernardino I. Guido married the daughter of Obizzo III d'Este of Ferrara, Elisa d'Este, who gave him numerous children. Most of the daughters, including Samaritana da Polenta, married other lords of Romagna and northern Italy, such as Antonio I della Scala.

In 1389 he was imprisoned by his sons Bernardino, Ostasio, Obizzo, Aldobrandino, Azzo and Pietro, and died in jail.{{Cite book |last=Litta |first=Pompeo |url=http://gallica.bnf.fr/ark:/12148/btv1b84523552 |title=Famiglie celebri di Italia , Da Polenta Signori di Ravenna |series=Famiglie celebri di Italia}}{{Cite book |last=Muratori |url=https://books.google.com/books?id=r7sLHpNh-SUC |title=Annali d'Italia: dal principio dell'era volgare sino all'anno 1750 |date=1763 |publisher=per Vincenzo Giuntini |pages=196 |language=it}}