Felix V abdicates his claim to the papacy, ending the reign of the final Antipope.

Amadeus VIII, nicknamed the Peaceful, was Count of Savoy from 1391 to 1416 and Duke of Savoy from 1416 to 1440. He was the first to hold the ducal title, granted by Emperor Sigismund. Known for his diplomatic temperament and administrative reforms, he strengthened the state's institutions and fostered internal peace.

The pope is the bishop of Rome and the visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the pope was the sovereign or head of state of the Papal States, and since 1929 of the much smaller Vatican City state. From a Catholic viewpoint, the primacy of the bishop of Rome is largely derived from his role as the apostolic successor to Saint Peter, to whom primacy was conferred by Jesus, who gave Peter the Keys of Heaven and the powers of "binding and loosing", naming him as the "rock" upon which the Church would be built. The current pope is Leo XIV, who was elected on 8 May 2025 on the second day of the 2025 papal conclave.

An antipope is a person who claims to be Bishop of Rome and leader of the Roman Catholic Church in opposition to the officially elected pope. Between the 3rd and mid-15th centuries, antipopes were supported by factions within the Church itself and secular rulers. While modern claimants to the papacy still take place, they are rarely given serious consideration by either the public or the Church.

April 7 is the 97th day of the year in the Gregorian calendar; 268 days remain until the end of the year.