Pope John V served as the head of the Roman Catholic Church from 685 to 686 AD. He is known for his efforts to strengthen the church during a time of political instability. His papacy was marked by a focus on maintaining church unity and addressing various theological disputes. During his short reign, Pope John V also worked to improve relations with the Byzantine Empire. He is remembered for his commitment to the faith and his role in the early development of the church, although little detailed information about his actions and policies survives today.