Benedict XVI has marked the 150th anniversary of L'Osservatore Romano by hailing the newspaper as "a guiding beacon". The Chinese authorities have reportedly detained a Vatican-approved priest, blocking his ordination as a bishop, Bishop Daniel Walsh of Santa Rosa, California, has resigned early saying he is "exhausted from dealing with the clergy abuse cases that had arisen over the years". Cardinal Marc Ouellet, prefect of the Congregation for Bishops, has said that being Pope "would be a nightmare". Archbishop Antonio Mennini, the Apostolic Nuncio to Great Britain, has celebrated a Mass for the Holy Father at Westminster Cathedral (photos). Sami El-Yousef, the Pontifical Mission’s director for Israel and Palestine, tells David Kerr that the number of Christians in the Holy Land may actually be increasing. Rorate Caeli profiles a female religious who received her habit on the same day Benedict XVI was born and has spent 84 of the 103 years of her life in a cloistered convent. And Tom Hoopes considers why the Pope sent his first tweet this week.