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Liberum veto

The Editors of Encyclopaedia Britannica · Encyclopaedia Britannica · 2026

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Web page
Author
The Editors of Encyclopaedia Britannica
Accessed
2026-09-01
Reliability notes
Online article, accessed 23 October 2026.

Claims citing this source

2 claims
EstablishedThe liberum veto, which in practice required unanimity in the Sejm, was first used to end a session in 1652 and was later used often to block legislation, until the Constitution of 3 May 1791 abolished it.DisputedThe liberum veto was the principal cause of the Commonwealth's decline and fall.