Poland has its own contribute to the development of European parliamentarism and constitutionalism. The State Treasury Sollicitor’s office is one the institutions in a democratic country, whose mission is representation of Poland before the national and international courts and tribunals. However, the first litigation body was The Sollicitors’ Office of the Polish Kingdom, established under the Tsarist law in 1816. Its political system followed the Austrian solutions. The scope of competences of that Sollicitor’s Office was based on the competence model of similar institution from the times of ancient Rome – advocatus fisci. The Sollicitor’s Office of the Republic of Poland was established in 1919 which was subordinated to the Ministry of Treasury. After the II World War existence of the Sollicitors Office was continued until 1951. After 1989, the idea of restoring Sollitors’ Office came back. In 2005, the bill was passed on base of which The State Treasury Solicitors Office began to function from the 15th March 2006.