The Catholic Church’s beliefs are detailed in the Catechism of the Catholic Church. The Catholic Church is trinitarian since it believes that there is one eternal God who exists as a mutual indwelling of three persons: the Father, the Son Jesus and the Holy Spirit. Catholic teachings have been refined and clarified over the centuries by councils of the Church convened by Church leaders at important points throughout history. The first such council, the Council of Jerusalem, was convened by the apostles around the year 50. The most recent was the Second Vatican Council, which closed in 1965. The Nicene Creed dating back to the First Council of Nicaea (325), is the core statement of Catholic Christian belief. This creed is recited at Sunday Masses and is also the central statement of belief of many other Christian denominations. Eastern Orthodox Christians do not accept the filioque clause. Protestant churches vary in their beliefs, but generally accept the Nicene Creed with reservations regarding the term “Catholic”. They generally differ from the Catholic Church regarding the authority of the Pope, Church Tradition, the Eucharist, and on issues pertaining to divine grace, good works and salvation.