Otto of Tonengo
Catholic cardinal
Otto of Tonengo (c. 1190 – 1250/1251) was an Italian papal diplomat and cardinal, first as deacon of San Nicola in Carcere from 1227 and then as bishop of Porto e Santa Rufina from 1244.
He is called in many English sources Otto Candidus, meaning "Otto the White", a name he used himself.
Otto had a legal education, and had joined the Roman curia by 1225. His first mission was to England to raise funds for the Sixth Crusade in 1225–1226. In 1227–1228, he undertook his first embassy to Frederick II, Holy Roman Emperor. In 1229–1231, he travelled extensively through France, the Low Countries, Germany, Denmark and Norway on Papal business. In 1232–1233, he undertook his second embassy to Frederick II.
In 1237–1240, he was the apostolic legate in England, Scotland and Ireland. This was by far his most successful mission. Returning to the curia, he was captured by imperial forces in the battle of Giglio in 1241.
The public source identifies “Otto of Tonengo” as catholic cardinal. This brief keeps that definition visible, then builds a research path around Otto, Tonengo and Catholic.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 1, 2026. The linked authority identifier is Q517189. VIAF identifies the subject as 39777347. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1190, 1250, 1251 and 1227.
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This entry incorporates text from “Otto of Tonengo” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.