Question: Who died first, John F. Christhilf or Bolesław The Pious?
Sentence (from "Bolesław the Pious"): Bolesław the Pious( 1224/27 – 14 April 1279) was a Duke of Greater Poland during 1239 – 1247( according to some historians during 1239 – 1241 sole Duke of Ujście), Duke of Kalisz during 1247 – 1249, Duke of Gniezno during 1249 – 1250, Duke of Gniezno- Kalisz during 1253 – 1257, Duke of whole Greater Poland and Poznań during 1257 – 1273, in 1261 ruler over Ląd, regent of the Duchies of Mazovia, Płock and Czersk during 1262 – 1264, ruler over Bydgoszcz during 1268 – 1273, Duke of Inowrocław during 1271 – 1273, and Duke of Gniezno- Kalisz from 1273 until his death.
Relevant evidence: Yes