The governmental texts labelled 'Riksdagstryck' in the Swedish
Diachronic Corpus are derived from https://riksdagstryck.kb.se/,
containing documents produced in the Swedish Riksdag during the time
periods 1521--1617 (early parliamentary-like meetings), 1618--1866
('Ståndsriksdagen') and 1867--1970 ('Tvåkammarriksdagen'). The texts
have been digitised by Riksdagsförvaltningen (the Swedish Parliament
administration) and made available via Kungliga biblioteket (National
Library of Sweden, KB), under a Creative Commons CC0 1.0 licence.


If you want to know more about the Swedish Diachronic Corpus, the
following SweClarin reports may be of interest: 

SCR-03-2019
Towards a Swedish diachronic corpus: Intended content, structure and format of version 1.0
Eva Pettersson & Lars Borin
url: https://sweclarin.se/sites/sweclarin.se/files/outline-swedish-corpus.pdf

SCR-02-2019
Swedish diachronic texts: Resources and user needs to consider in a Swedish diachronic corpus
Eva Pettersson & Lars Borin
url: https://sweclarin.se/sites/sweclarin.se/files/swedish-historical-texts_3.pdf

SCR-01-2019
Characteristics of diachronic and historical corpora: Features to consider in a Swedish diachronic corpus
Eva Pettersson & Lars Borin
url: https://sweclarin.se/sites/sweclarin.se/files/diachronic-corpora-sweclarin-v3.pdf