Frederick von Saarwerden was archbishop-elector of Cologne as Frederick III from 1370 to 1414. Through the promotion of his great-uncle, Archbishop Kuno II of Falkenstein of Trier, Frederick von Saarwerden was elected archbishop of Cologne at the age of 20, which the Pope in Avignon also confirmed two years later after some misgivings. Frederick found the archbishopric completely plundered by his two predecessors of the County of Mark, Adolf and Engelbert, and had himself promised high payments to the Curia on the occasion of his election. Nevertheless, with the help of his very rich great-uncle Kuno, he succeeded in paying off the debts of the archbishopric within a few years.
Frederick von Saarwerden supported Emperor Charles IV and was therefore granted privileges by him that supported Frederick's policy of rule.
Wikipedia https://en.wikipedia.org/wiki/Friedrich_III._von_Saarwerden
Address 1 Vor dem Rheintor, Feste Zons 41541, Germany
Coordinates 51°7'22.403" N 6°51'4.325" E