The term "Infante of Portugal" refers to a title given to the sons of the reigning monarch of Portugal. Traditionally, the title is used for royal princes who are not the direct heirs to the throne. The title has historical significance, as it was often associated with noble duties and responsibilities within the kingdom. One of the most notable Infantes was Infante Henry, known as Henry the Navigator, who played a crucial role in the early days of the Portuguese Age of Discovery. His efforts in exploration and maritime advancements significantly contributed to Portugal's status as a leading maritime power in the 15th century.