Plecnik Parliament is the colloquial name of two designs for a building intended to house the legislature of the People's Republic of Slovenia within the second Yugoslavia. Formally known as the Slovene Acropolis and the Cathedral of Freedom, the two designs were proposed in 1947 by Slovenia's most eminent architect, Joze Plecnik, but were rejected in favour of a more conventional design.

Slovene Acropolis

In response to a personal government invitation during the late 1940s, Plecnik initially proposed the fairly radical idea of placing the parliament on the hilltop above the Slovenian capital of Ljubljana, then occupied by the Ljubljana Castle. Influenced by the extensive remodeling of Prague Castle he had carried out during the 1920s, the "Slovene Acropolis" concept called for the demolition of all or most of the medieval structure and its replacement with a monumental octagonal complex, including a triumphal access ramp or stairway that would have begun next to the Magistrat at the foot of Castle Hill.

The authorities were caught off-guard by the radicalism of the plan. Deeming it unimplementable, they instead called for a second round of proposals, this time in the form of an open competition and with a location for the building specified: the Ilirija swimming pool complex in Ljubljana's Tivoli gardens. While annoyed by the cold shoulder given his idea and not in the habit of entering competitions due to his age and status, Plecnik's initial reluctance eventually subsided. His second design, the "Cathedral of Freedom," is now far better known than the first and the far more common referent of the term "Plecnik Parliament," although the first proposal is technically encompassed by it as well.

Cathedral of Freedom

A square, colonnaded false facade would have surrounded the cylindrical main building of two stories, surmounted by a tall, spirally tapering conical cupola. Supported internally by inclined columns, the cupola would have spanned the parliament chamber. The facade would have measured 50 m in length, the tower rising to 120 m. Several slightly varying designs were produced, some including a second colonnade wrapping the second floor of the main building, different porticoes, or an asymmetrical ground floor.