Because that was the name he chose when he was elected as pope.
It was Pius XII. He was pope from Mar. 2, 1939 to his death on Oct. 9, 1958.
Pope Pius XII's birth name is Pacelli, Eugenio Maria Giuseppe Giovanni.
Pope Pius XII is 6'.
There has never been a Pope Pius XVI. Pius XII was the last pope by that name.
Pope Pius XII was born on March 2, 1876.
Pope Pius XII was born on March 2, 1876.
Testament of Pope Pius XII was created in 1956.
Pius XII became pope on March 2, 1939.
Pope Pius XII followed Pius XI.
Pius XII was elected on March 2, 1939.
Pope John XXIII followed Venerable Pius XII.
Pope Pius XII - Cardinal Cushing - was created in 1959.