Third Crusade
King Conrad
With so many troubles besetting him, Richard knew that he would have to settle the dispute over the Kingdom once and for all. He went back to Acre in April of 1192, summoned the barons of the kingdom, and asked for advice. All the barons now spoke for Conrad; only Guy's own kin would side with him. Given the precarious situation, Richard now reversed his support and agreed that Conrad should be made king. Not least in Richard's calculations must have been the knowledge that once Conrad was king, he would bring his forces and join in the Crusade.
Conrad was at Tyre when the news was brought to him and there was general celebration, for Guy was still widely blamed for the disaster at Hattin. He announced he would leave for Acre in a few days.
On April 28, Conrad decided to go dine with the Bishop of 
Beauvais. On his way back home again, two men approached him. One handed him a letter to read. When he took it, the other man pulled out a knife and stabbed Conrad to death. One murderer was killed on the spot. The other confessed that he had been sent by the Old Man of the Mountain. The Assassins had struck again.
Isabella was fearful of her safety and shut herself up in her castle. Henry of Champagne, Richard's nephew, hurried up to Tyre. The people of the city at once declared that he should marry Isabella and be made the new king. He was young, handsome, courageous, and widely popular. It was obvious that Guy could not be chosen and equally obvious that the kingdom could not be without a king in the face of Saladin. Henry was hesitant, for he wanted to return to Champagne, but he felt it was his duty to agree.
So, only two days after Conrad's assassination, Henry and Isabella were betrothed. They went down to Acre where Richard gave his approval, and within a week they were married. Henry of Champagne was now King of Jerusalem.
And what of Guy of Lusignan? Richard made an excellent arrangement for him. The Templars had had no more success in governing Cyprus than had the English, and they now wanted Richard to take it back. Instead, he proposed that Guy buy the island from the Templars. This suited everyone and Cyprus was taken over by the Lusignans, who would rule it for almost two hundred years.