Saint Justin, also known as Saint Justin Martyr, was an early Christian apologist born around 100 AD in Flavia Neapolis, present-day Nablus, Palestine. He is best known for his writings that defended Christianity against pagan criticisms and for his efforts to explain the faith to non-believers. His most notable works include the "First Apology" and the "Second Apology," where he addressed the Roman Emperor and the Senate. Justin was martyred around 165 AD in Rome for refusing to renounce his faith. He is recognized as a saint in both the Roman Catholic Church and the Eastern Orthodox Church. His feast day is celebrated on June 1, honoring his contributions to early Christian thought and his unwavering commitment to his beliefs.