What is now known as the Week of Prayer for Christian Unity was founded by a community founded in the Protestant Episcopal Church in the United States by Father Paul Wattson in the 1890s, and entering the full communion of the Catholic Church in 1909. To begin, this time set aside to pray for the reunion of Christendom was known as the Octave of Christian Unity, running from the 18th to 25th January each year. These dates are of course significant: 25th January is the feast of the Conversion of Saint Paul, whilst 18th January is known as the feast of the Chair of Saint Peter or, in some Anglican circles, as the feast of the Confession of Saint Peter. In fact, the gospel traditionally assigned for this feast—whichever name we choose to apply—is the account given by Saint Matthew of what we have just heard this morning from Saint Luke, which includes the Christ’s response: Thou art Peter, and upon this rock I will build my church (Mt. 16: 18). In other words, the confession of Saint Peter—Thou art the Christ, the Son of the living God—is intimately linked with the power bestowed on him by Christ in his Chair, that seat of his apostolic authority after which the personal ordinariate in North America takes its name.