Isabella I of Jerusalem tried to play Isabella and her husband off against him, but Humphrey did homage to the royal couple. Isabella was the daughter of Amalric, King of Jerusalem, by his second wife, Maria Comnena. Maria Comnena (who was a grandniece of the Byzantine Emperor, Manuel I Komnenos) married Amalric on 29 August 1171. Isabella was born before September 1172. Amalric died unexpectedly on 11 July 1174. His son by his first marriage, Baldwin IV, was crowned king two weeks later. Before long, it became obvious that Baldwin suffered from lepromatous leprosy. To secure the succession of the ailing king, his sister,
Baldwin of Forde heir, Prince Richard, who had rebelled against his father. After Henry's death, Richard sought and obtained absolution for the sin of disobedience to his father from both Baldwin and Walter de Coutances, Archbishop of Rouen. Baldwin, along with Coutances, was with Richard on 20 July 1189 at Rouen when the king was invested with the Duchy of Normandy. Baldwin crowned Richard at Westminster Abbey on 13 September 1189 in the first English coronation for which a detailed description survives. After the death of Henry II, and the accession of Richard as king, the monks of Christ Church Priory petitioned Richard