Attempts at reform, such as the Four-Year Sejm's May Constitution came too late.

He was an envoy at the Four-Year Sejm, and she wrote speeches for her him and her cousins.

He was an envoy at the Four-Year Sejm, at which he supported the Constitution of 3 May.

This took place during the period of deliberations by the Four-Year Sejm, which ended with the proclamation of the 3 May Constitution in 1791.

The Four-Year Sejm (1791) decided that the privilege be granted to inhabitants of royal cities who owned real property there and to the Polish Jews.

They returned in 1788, when Jan became an envoy at the Four-Year Sejm and Julia supported the Constitution of 3 May.

He was a deputy of Lublin and one of the leaders of the Patriotic Party on the Four-Year Sejm.

The long-lasting sejm convened by Stanisław August in 1788 is known as the Great, or Four-Year Sejm.

Valkininkai together with 73 other towns was granted city rights and coat of arms in 1792 by King Stanisław August Poniatowski during the Four-Year Sejm.

During the Four-Year Sejm in 1788, he was a member of the Military Commission of the Commonwealth and a supporter of the 3rd May Constitution.

From 1800, he was a member of the Warsaw Society of Friends of Learning, to whom he left his political materials of the Four-Year Sejm.

The Permanent Council was eliminated in 1789 by the Four-Year Sejm and briefly reinstated in 1793 by the Sejm of Grodno.

Kossakowski had been a member of the Four-Year Sejm and was awarded the Order of the White Eagle by King Stanisław August Poniatowski in 1793.

The Constitution of 3 May 1791, the first of its type in Europe and the world's second-oldest codified national constitution after the 1789 U.S. Constitution, was drafted here by the Four-Year Sejm.

The Patriotic Party was established during the Four-Year Sejm (Great Sejm) of 1788-92 by individuals who sought reforms aimed at strengthening the Polish-Lithuanian Commonwealth and assuring its independence from the Russian Empire.

A strong supporter of reforms of the Polish-Lithuanian Commonwealth and then the Kingdom of Poland, he was a member of the Four-Year Sejm and a partisan of the Society of the Friends of the Constitution.

Two days after the Four-Year Sejm had passed the 3 May Constitution, on 5 May 1791, the members and the king made a commitment of thanksgiving to erect a church 'ex voto of all states ... dedicated to the highest Providence.'

On the night of May 2-3, 1791, a conspiratorial group of members of the Four-Year Sejm who were bent on saving the Commonwealth met at the palace to strategize means to secure the adoption, next day, of the May 3rd Constitution.