| LC control no. | n 2009016805 |
|---|---|
| Descriptive conventions | rda |
| Personal name heading | Konrad I, Duke of Mazovia, 1187 or 1188-1247 |
| Variant(s) | Conrad, Duke of Mazovia, 1187 or 1188-1247 Konrad, I, Duke of Mazovia, 1187 or 8-1247 Konrad I Mazowiecki, 1187 or 1188-1247 Konrad Mazowiecki, 1187 or 1188-1247 |
| Associated country | Poland |
| Birth date | [1187,1188] |
| Death date | 1247 |
| Found in | Konrad Mazowiecki (1187/88-31 VIII 1247), 2008. Britannica online (Konrad, I (Duke of Mazovia)) Wikipedia, March 27, 2009 (Konrad I of Masovia) Davies, N. God's playground, 1982: volume 1, page 86 (Konrad of Mazovia) index (Konrad Mazowiecki, Prince) Czajka, M. Leksykon historii Polski, 1995: page 338 (Konrad I Mazowiecki, Duke of Mazovia and Kujawy from 1202; b. 1187/88; d. July 31, 1247) Nowa encycl. powsz (Konrad I Mazowiecki; Duke of Mazovia and Kujawy from 1202; b. 1187/88; d. July 31, 1247) ThePeerage website, September 23, 2009 (Conrad, Duke of Masovia, 1187/88-1247) Wikipedia, viewed October 15, 2019 (Konrad I of Masovia; Polish: Konrad I Mazowiecki; ca. 1187/88-31 August 1247; from the Polish Piast dynasty, was the sixth Duke of Masovia and Kujawy from 1194 until his death as well as High Duke of Poland from 1229 to 1232 and again from 1241 to 1243; in an effort to enlarge his dominions, he unsuccessfully attempted to conquer the adjacent pagan lands of Chełmno in Prussia during a 1209 crusade with the consent of Pope Innocent III; there was a long-term border quarrel with the Prussian tribes; around 1208/1209 he married Agafia of Rus, daughter of Prince Svyatoslav III Igorevich; they had ten children) |
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