Title: Sobornoe poslanīe russkogo dukhovenstva i mīri︠a︡n k rimskomu Papi︠e︡ Sikstu IV pisannoe iz Vilʹna 14 marta 1476 goda
Subjects: Relations, Catholic Church, Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ