1. Adamska, M. E. (2015). Play of tradition and modernity. The interwar competition for the seat of the authorities of the Regency of Opole. Czasopismo Techniczne, 112(9-A), 5–12.
2. Auf den Spüren unseren Vorväter—das germanische Oppeln wiederentdeckt [On the traces of our forefathers—Germanic Opole rediscovered]. (1935, May 10). Kurier, 3.
3. Bogdoł, G. (2019, February). Pomnik Fryderyka II Wielkiego w Opolu [The monument of Frederick the Great in Opole]. Opole z Sercem. https://www.opolezsercem.pl/2019/02/pomnik-fryderyka-ii-wielkiego-w-opolu.html
4. Budowa Amfiteatru 1000-lecia rozpoczęta [The construction of the Millennium Amphitheatre began]. (1958, June 7–8). Trybuna Opolska, 2.
5. Czepczyński, M. (2016). Cultural landscapes of post-socialist cities: Representation of powers and needs. Routledge.