Invicti athletae

Invicti athletae Latin for 'Of the unconquered athlete' Encyclical of Pope Pius XII
Signature date	16 May 1957
Subject	Commemorating the 300th anniversary of the martyrdom of St. Andrew Bobola
Number	37 of 41 of the pontificate
Text	In Latin In English
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Invicti athletae (May 16, 1957) is an encyclical of Pope Pius XII to the bishops of the world on the 300th anniversary of the martyrdom of Saint Andrew Bobola.

Some parts of the encyclical are addressed particularly to the Catholics of Poland.