ABSTRACT Parliamentary development in Poland had been interrupted by long periods of loss of national sovereignty. Hence, while Poland boasts a parliamentary tradition going back to the fifteenth century, Polish parliamentarism has been influenced by both accommodation and resistance to a variety of externally imposed frameworks or revolutionary projects, making the relationship between debate, democratization, and parliamentary procedure neither simple nor linear. Practices that may have been undemocratic in one political context played a democratizing role in another context. Periods of limited national or political sovereignty (including the nineteenth-century partitions or the Communist period between 1945 and 1989) led to the rise of quasi-parliamentary or extra-parliamentary bodies and practices that circumvented the limitations imposed on parliament and that became part of the Polish parliamentary tradition. The example of the Polish Parliament shows that specific parliamentary practices may have either detrimental or democratizing effects on debate, depending on the broader political context and the specific exigencies of the political moment and the actual political meaning of particular procedures, rules, and behaviours (including their ‘democratizing’ thrust) emerges as a function of their deployment in the specific context of particular political moments and projects.