Hieronim Ossoliski, , coat of arms Topr, was a Polish statesman, kasztelan of Sandomierz and Wojnicz, a delegate to the Sejm of 1569 and one of the signatories of the Union of Lublin, which formally united Poland and Lithuania into the PolishLithuanian Commonwealth. Ossoliski was a Calvinist, and a leader of Protestants in the province of Maopolska during the reign of king Zygmunt August. Ossoliski was also one of the leaders of the Executionist movement, which sought to reform 16th century Polish politics.
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Source: Wikipedia