Prince Jan Duklan Maurycy Paweł Puzyna de Kosielsko (13 September 1842 – 8 September 1911) was a Polish Roman Catholic Cardinal who was auxiliary bishop of Lwów (now Lviv, Ukraine) from 1886 to 1895,[1] and the bishop of Kraków from 1895 until his death in 1911.

Ordained a priest on 1 December 1878, he was a vicar (assistant pastor) at Przeworsk, and then became a Canon of the Cathedral of Przemyśl.

On 15 April 1901, Puzyna was created a cardinal-priest, with the title of Santi Vitale, Valeria, Gervasio e Protasio by Pope Leo XIII.

[5] During the conclave of 1903,[6] acting on behalf of his Sovereign, Emperor Franz Joseph I of Austria, he presented a veto against the election of Cardinal Mariano Rampolla.

The veto, although not recognized by canon law, and as such non-binding, still carried much political weight, as the cardinals feared opposing the manifest will of one of the Christian monarchs.

[citation needed] The veto, once conceded by tradition to the Emperor, the King of France and the King of Spain, was abolished by the newly elected Pope Pius X, who imposed the penalty of excommunication upon anyone who would dare to introduce a veto, or otherwise interfere in the election of the Roman Pontiff.