Baldwin V was the last king of Jerusalem, reigning from 1185 to 1186. He was born in 1177 and became king at a young age after the death of his father, Baldwin IV, who suffered from leprosy. Baldwin V's reign was short due to his own health issues, and he was only nine years old when he ascended to the throne. After Baldwin V's death in 1186, the throne of Jerusalem passed to Guy of Lusignan, leading to a power struggle that weakened the kingdom. His reign is significant as it marked the end of the Baldwin dynasty in the region.