Context: The medieval city is a foundation of the Zähringer ruling family, which rose to power in Upper Burgundy in the 12th century. According to 14th century historiography (Cronica de Berno, 1309), Bern was founded in 1191 by Berthold V, Duke of Zähringen.

Question: The medieval city is a foundation of what family?
Answer: Zähringer

Question: When did the Zahringer ruling family rise to power?
Answer: 12th century

Question: Where did the Zahringer ruling family rise to power?
Answer: Upper Burgundy

Question: What year was Bern founded?
Answer: 1191

Question: Who founded Bern?
Answer: Berthold V, Duke of Zähringen