2 Sejmu Śląskiego Square in Katowice, Cultural centre in Katowice, Poland

The building at 2 Sejmu Śląskiego Square is a late-modernist public building completed in 1979, designed by Zdzisław Stanik of Biprohut. Its above-ground structure rests on a steel frame, with rusticated supports contrasting with white sheet-metal cassettes on the facade, made by Mostostal Zabrze. The corners are rounded to fit the tight surroundings. It contains a suspended auditorium for 1,007 people, now the Grzegorz Fitelberg Concert Hall.

The building was erected from spring 1977 on the initiative of the PZPR voivodeship committee, with Zdzisław Grudzień, its first secretary, as the main promoter; his name gave the building its nickname. Designed by Biprohut under architect Zdzisław Stanik, it opened on 10 December 1979 as the Centre for Ideological and Educational Training of Workers' Cadres. In 1983 a cultural centre was created inside, later renamed Górnośląskie Centrum Kultury and then Katowice – Miasto Ogrodów.

The building's nickname, Dezember Palast or "December Palace", comes from Zdzisław Grudzień, the PZPR regional secretary who initiated it; grudzień is Polish for December. Since 2010 it has housed the Krystyna Bochenek Culture Centre, now Katowice – Miasto Ogrodów, alongside Teatr Korez, the Hipnoza jazz club and the "Ultramaryna" magazine, and it hosts exhibitions, festivals and concerts.

The building stands on Plac Sejmu Śląskiego, near the Katowice central axis, and is reached on foot from the Rynek or the train station. The monumental auditorium on the square side seats 1007 and is used for concerts and events; check the programme of the Katowice – Miasto Ogrodów institution before visiting.

The concert hall seats 1,007 and was built as a suspended structure on four columns anchored in reinforced concrete blocks. Its 1,008 armchairs were imported from Spain and paid for in coal. Acoustics were inverted: sound carried best on the stage rather than in the audience.