In 1817 he was appointed as a dean in Přeštice and 6 years later, in 1823, became a canon of the Metropolitan Chapter of the Roman Catholic Archdiocese of Prague in the St. Vitus Cathedral.

On November 14, 1824, he was consecrated as a bishop by Metropolitan Archbishop Václav Leopold Chlumčanský and other prelates of the Roman Catholic Church.

[2] He also was a theologian and a spiritual writer, one among the founders of the "Časopis katolického duchovenstva" (Magazine of a Catholic Clergy) in 1828.

[1] On February 24, 1832, he was confirmed by the Holy See as a Diocesan Bishop of the Roman Catholic Diocese of Tarnów in a present-day Poland and 4 years later, on February 1, 1836, with the transfer of the previous Metropolitan to another see, he was confirmed by the Holy See as a Metropolitan Archbishop of the Roman Catholic Archdiocese of Lviv.

[3] Archbishop Pištěk died, while in the office, on February 1, 1846, and was buried in the crypt of the Mary Gromnicza Church.