ENIn the relationship between Augustine and Tadeusz, three periods can be distinguished. The initial agreement and recognition lasted until 1887. The second period was filled with gradual hatred, although there are still remains of mutual respect. The total severance of ties, imbued with numerous pretensions and accusations, fell in the early 20th century. Keywords: political and legal thought, Tadeusz Wróblewski, Augustyn Wróblewski, Vilnius.