King Peter I of Portugal, also known as Peter I, ruled from 1357 to 1367. He was the son of King Afonso IV and became known for his romantic relationship with Inês de Castro, a noblewoman. Their love story is famous in Portuguese history, often described as tragic. During his reign, Peter I focused on consolidating royal power and addressing issues of governance. He was known for his efforts to improve the legal system and promote justice. His reign, though short, left a lasting impact on the monarchy and the cultural landscape of Portugal.