After the Union of Lublin, the Senate of general sejm of the Commonwealth became augmented by Lithuanian high officials; the position of the lay and ecclesiastical lords, who served for life as members of the Senate was strengthened, as the already outnumbered middle szlachta high office holders had now proportionally fewer representatives in the upper chamber.
Pärast Lublini uniooni täiendati liitriigi seimi senatit Leedu kõrgemate ametnikega; ilmalike ja kiriklike isandate, kes olid senati eluaegsed liikmed, positsioon tugevnes, kui juba vähemuses keskmise šlahta kõrgametnikel oli nüüd proportsionaalselt vähem esindajaid ülemkojas.