's painting of the
Union of Lublin Protasewicz was appointed as
bishop of Lutsk by
Pope Paul III on 27 May 1549 and as bishop of Vilnius by
Pope Paul IV on 10 April 1556. At first, he was more interested in political affairs, participating in the
Seimas and advising the Grand Duke. Generally, Protasewicz supported judicial independence of the Grand Duchy of Lithuania and opposed a closer
union between Poland and Lithuania. In 1568, Protasewicz joined a commission preparing the third
Statute of Lithuania and headed it until his death. He was a leading member of the Lithuanian delegations sent to the Polish
Great Sejm to negotiate the
Union of Lublin. In 1554, Protasewicz excommunicated the first clergymen who converted to Protestantism but was overall passive and indecisive when it came to combating the
Reformation. He was criticized by his contemporaries, including
Augustinus Rotundus and
Stanislaus Hosius, for neglecting religious matters and allowing the Reformation to spread. Protasewicz soon began to combat the Protestantism by calling two diocesan
synods, disciplining priests, and improving the
Cathedral School of Vilnius. He constructed churches in
Šešuoliai and . In 1573, Protasewicz reburied remains of Grand Duke
Vytautas (died in 1430) by the altar of the Holy Cross in
Vilnius Cathedral and built a tomb sponsored by Queen
Bona Sforza. His most important contribution to the
Counter-Reformation was the establishment of Vilnius Academy in 1570. He obtained privileges to convert the academy into a university in 1579. Protasewicz also laid the groundwork for the
Vilnius Theological Seminary, established in 1582. In 1574, after death of Samogitian bishop
Jurgis Petkūnas,
Archbishop of Gniezno Jakub Uchański attempted to promote his nephew. Protasewicz protested such
nepotism and instead managed to persuade the Pope to install
Merkelis Giedraitis. At the same time he selected
Paweł Holszański as his successor and appointed him as
coadjutor bishop. Protasewicz died in 1579 and was buried at
Vilnius Cathedral. ==Vilnius Academy==