Conversation so far:
What was Richard I of England's occupation?
Richard I was King of England from 1189 until his death.
What happened during the third crusade in Sicily?
Tancred had seized power and had been crowned early in 1190 as King Tancred of Sicily.
Are there any other interesting aspects about the Richard I of England article?
King Tancred of Sicily imprisoned King William II of Sicily's widow, Queen Joan (also Richard I of England's sister), not giving her the money she inherited in William's will.
What happened after King Tancred of Sicily imprisoned Queen Joan?
When Richard I of England arrived he demanded that his sister Queen Joan be released and given her inheritance; she was freed on 28 September, but without the inheritance.
What did Richard I do about not getting Queen Joan's inheritance?
Richard I of England attacked, captured, and stayed in Messina, not leaving until Tancred finally signed a treaty giving Queen Joan 20,000 ounces of gold as compensation for her inheritance.
Did Richard I die?
Richard I of England died on 6 April 1199 in the arms of his mother.

Question: What else happened?
Self-contained rewrite: What else happened besides Tancred seizing power as King Tancred of Sicily, Queen Joan's imprisonment, Richard I of England capturing Messina, Queen Joan's inheritance, and Richard I of England's death?