The initiator of the establishment of these institutions was Stanisław Kościałkowski [pl], who supervised their operation for the next few years.
[1] From the retreating Russian authorities, the association obtained permission to organize gymnasium courses.
[3] For the first three years (1915–1917) the school faced many problems, caused both by the activities of the German occupation authorities and the lack of financial resources.
[3] The situation improved after the capture of Vilnius by the Polish army in April 1919 – the school received material support from the state authorities, and moved to a spacious building at 11 Mała Pohulanka Street.
Graduates of the Sigismund Augustus Gymnasium included Edward Borowski, Witold Czarnecki (architect), Antoni Gołubiew, Zbigniew Ihnatowicz, Tadeusz Konwicki, Czesław Miłosz, Jan Safarewicz, Andrew Schally, Stanisław Stomma, Andrzej Święcicki, Ignacy Święcicki, Wiktor Trościanko, Ananiasz Zajączkowski, Czesław Zgorzelski, Józef Żyliński, Ryszard Kiersnowski, and many others.