Among his achievements was the foundation of the monasteries of the Discalced Carmelites and the Good Friars in Vilna (modern Vilnius, Lithuania), the latter of which also opened up a hospital and a pharmacy nearby.

[citation needed] Two synods were held in the Vilnius diocese while Woyna was bishop, in 1631 and 1635; in 1633, Woyna ordered the compilation of the resolutions of various prior synods, titled "Constitutiones Synodorum dioecesis Vilnensis diversis temporibus celebratarum Jussu".

[1] The previous bishop, Eustachy Wołłowicz, had supported the church authorities' decision to transfer the church built by Piotr Korkonos in 1616 to the Canons Regular of the Lateran, but a lack of funds when the first two monks arrived in 1625 meant the foundation was postponed.

Specifically, the decree established tenement housing for the Jewish populace following what the text refers to as "tumults" in 1634.

[5] Another such effort was an accusation of sacrilege against Krzysztof Radziwiłł brought before the diet in 1646 where Woyna demanded a sentence be rendered based on only the evidence he presented.