Pope Francis on Monday appointed Sister Simona Brambilla to head the Vatican office that oversees religious orders for both men and women — including more than a quarter of the world’s priests — making her the first woman to reach the No. 1 position in an office in the Holy See. The choice reflects Francis’ avowed aim to give women greater leadership roles in the Roman Catholic Church. He has named several women to high-ranking positions, including the director of the Vatican museums. Sister Brambilla is the first prefect of a department of the Roman Curia, as the central administration...