king, a major role in the conduct of foreign affairs, and the right to reject new
legislation. The increasingly constitutional basis of the Polish polity allowed
for the lasting inclusion of units with distinct traditions of local rights, such as
Royal Prussia.
9
By the same token, the Polish system created a model for neigh-
boring gentry who wished to formalize and extend their own privileges.
10
In
deciding upon a constitutional union with Poland, Lithuania’s gentry were pur-
suing such rights, privileges, and protections for themselves. During the period
of dynastic union with Poland, Lithuania became an East Slavic realm in which
the gentry enjoyed rights relative to the sovereign. By the terms of the Lub-
lin Union, Lithuanian nobles joined their Polish neighbors in a single parlia-
ment, and in the common election of kings. Lithuania preserved its own title,
administration, treasury, code of law, and army. The Commonwealth thereby
created was a republic of the gentry, whose myth of Sarmatian origin included
nobles of various origins and religions, and excluded everyone else.
11
After , the Polish identity of Lithuanian gentry was increasingly a matter
of culture as well as politics, involving sometimes acceptance of the Renais-
sance charms of Polish letters, sometimes conversion from Eastern Orthodoxy
to Roman Catholicism. The Reformation and Counter-Reformation followed
a special trajectory in the Grand Duchy. Like aristocratic families across Eu-
rope, much of the Lithuanian gentry converted to Calvinism in the s and
s. Orthodox converts were drawn to Protestantism not only by its methods
and doctrines, but by its similarity to the Eastern Church in matters of practice:
the marriage of clergy, the use of the vernacular in liturgy, and the chalice for
laymen. Unlike nobles in Germany or France, who converted from one variety
of Western Christianity to another, Lithuanian nobles usually partook in Re-
form by converting from Eastern to Western Christianity.
12
After a single gen-
eration as Protestants, formerly Orthodox Lithuanian families usually con-
verted to the Roman Catholicism. In this way, Protestantism proved to be the
unwitting ally of Catholicism in the Grand Duchy of Lithuania. It was not
Catholicism itself, but Reform which drew Orthodox Lithuanian nobles to ac-
cept Western Christianity, first in its Protestant and then in its Catholic form.
Of course, Counter-Reformation Catholicism adopted the tactics of its Protes-
tant rivals. Its use of Polish as the vernacular (although Catholics published a
few books in Lithuanian as well) reinforced the prestige of Polish culture among
the Lithuanian nobility, and its new proselytism brought the Lithuanian-
speaking peasantry into contact with the Polish language.
13
The Jesuits opened
an academy in Wilno in . Their propaganda against Protestantism could
The Contested Lithuanian-Belarusian Fatherland
22