Polish Society of Nephrology Polish Society of Nephrology Polish Society of Nephrology (PSN; Polish: Polskie Towarzystwo Nefrologiczne) – non-profit medical-scientific association, established in 1983, with a current headquarters in Warsaw that unites nephrologists, physicians and other scholars, experts and professionals in the fields of kidney diseases, dialysis therapy and renal transplantation. Polish Society of Nephrology was established during the First Funding Congress, which was held in September 1983 in Bydgoszcz and registered in the District Court in Łódź. To that time there were two separate societies gathering doctors and other health care professionals specialized in kidney diseases - Nephrology Committee of the Polish Academy
The six organs in the Palace of Mafra organs were produced that year. Shortly after their completion, the French invasion and the following exile of the Portuguese Court to Brazil led to the organs decaying for lack of maintenance. A decade later – possibly in connection with the prospect of the return of the Portuguese royal family – the six organs were subject to a major intervention. The intent of these works, undertaken by Machado e Cerveira, was not only to repair the instruments but also to enlarge them. Unfortunately, the works were interrupted a few years later (Machado e Cerveira died in 1828), and several items, such