Career
At the age of 22 he became Master of the military Order of Calatrava, and received in 1448 the strategic town of Peñafiel, where he built the Peñafiel Castle. When Prince Henry became King in 1454, Pedro received several towns and titles including Lord of Osuna, which would become the powerful House of Osuna. But when Pedro travelled to Madrid at the head of a 3,000-strong force to negotiate the marriage, he suddenly died.