Anthony, John, and Eustathius of Vilnius
Anthony, John, and Eustathius of Vilnius (Lithuanian: Antanas, Jonas ir Eustachijus) or The Three Martyrs of Vilnius were 14th century martyrs (d. 1347) of the Orthodox Church in Lithuania.
The brothers Kumetis and Nizilas were formerly pagan converts to Christianity, taking the names Anthony and John in baptism. Their cousin Krulis later converted, following their example, receiving the name Eustathius.
They served in the court of the pagan Grand Duke Algirdas (Olgierd) of Lithuania. Grand Duke Algirdas was married to the Orthodox Christian Russian Princess Maria Yaroslavna, and missionaries were present to minister to the religious needs of the princess and her retinue. The Grand Duke had nominally converted to Orthodoxy, but upon the death of Maria Yaroslavna, he apostasised and resumed his pagan ways. All evangelizing became strictly proscribed.
The three youths kept their conversion secret initially, but it was eventually noticed that they would fast at certain seasons and also did not cut their beards (which was the custom for Christians of that time and place). Because of their refusal to eat meat offered to pagan idols particularly during a fast, they were killed by Algirdas. Algirdas later realized that he had an opportunity for political connection with the imperial court in Constantinople and had a church built on the site of the martyrdom.