One very remarkable neon sign from communist-era Poland is the “Markiza” (Marchioness) sign found in the city of Krakow.
This sign was created in 1960 to advertise the Markiza bakery/sweet shop located in Krakow’s Osiedle Centrum A housing estate. The Markiza sign was one of a dozen adorning the estate during Poland’s socialist era. The sign, the bakery, and the housing estate all survived the fall of Communism in 1989 and are still in existence today.
In 2015, the sign was renovated and has been designated an object of cultural heritage by the Polish government.
- https://pl.wikipedia.org/wiki/Osiedle_Centrum_A (Polish Wikipedia entry on Osiedle Centrum A.)
(Image copyright: Zygmunt Put/Zetpe0202. Used via Wikimedia Commons per CC Attribution-Share Alike 4.0 International license.)