CELAM
He was created Cardinal Priest of S. Maria della Scala by Pius XII in the consistory of February 18, 1946. Caro, the first Chilean member of the College of Cardinals, served as papal legate to the Chilean Plenary Council on September 8, 1946, tenth National Eucharistic Congress on September 26, 1951, and later to the sixth Interamerican Congress of Catholic Education on August 30, 1956. Before participating in the 1958 papal conclave, Caro attended the first general conference of the Latin American Episcopal Conference in Rio de Janeiro, Brazil, in 1955.