1087287 | VATICAN CITY. Pius XII. (Pontiff, 1939-1958). An XVIII (1956) AR Medal. PCGS SP65. By Aurelio Mistruzzi. Edge: Plain. PIVS XII PONTIFEX MAXIMVS ANNO XVIII. Bust, right; signed on truncation / OPIFICVM EORVMQVE CONDVCTORVM CONSOCIATA NAVITAS. The Pontiff receives homage from the representatives of the Catholic labor force; in the background, Bernini's colonnade. Rinaldi 150; Bartolotti E 956; Cusumano Modesti 237.

Struck to commemorate the alignment of the date of Labor Day to the feast day of St. Joseph the craftsman.


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On May 1, 1955, the Pope in his speech established that Labor Day corresponded to the liturgical feast of St. Joseph the craftsman, thus giving it a Christian character.