(1738 – 1811), distinguished in service to the Polish theatre. He financed exhibitions of family and European art and organized numerous concerts, balls, and meetings. Celebrations organized by him were a meeting place for artists and aristocrats from across Europe, while in local memory he was remembered as an organizer of public events with fireworks displays. Prince Jerzy Marcin was also an adventurer and a member of the Bar Confederation. From 1758, he served in the Prussian and Russian armies. He was barred from political life in Poland by his family, but he went down in history as a lover of music and theatre. In 1777, he financed a production of Tartuffe by Molière; in 1783 leased the privilege of the theatre and made Wojciech Bogusławski its director. He also opened a ballet drama school for 1000 people. Prince Stanisław Lubomirski went down in history as an administrator of Warsaw. He introduced permanent street lighting and supported a police unit with his private money. Above all, he wished to care for the health of the Varsovians, wherefore he decided to surround the city, on both sides of the Vistula, with an earthen embankment, initially to protect against the spreading plague epidemic. There were only three crossings in the embankment, by which traffic in and out of the city was controlled. Later, the embankment, reinforced with guns, was used to defend the capital during the Kościuszko Uprising and the November Uprising. Throughout the 19th century, the embankment marked the boundary of the city. By the Act of 1770, Stanisław introduced permanent street names, which greatly facilitated the administration of the city and its functioning, especially facilitating registration and correspondence. Princess Izabela Lubomirska (1736 – 1816), the wife of Stanisław, rebuilt the Łańcut Castle and collected art and books from around the world. She was politically active; during the revolution, she sheltered part of the French court at her estate in Łańcut. She extended her residences, often employing the latest architectural solutions. She built a palace on her estate in Mokotów, the district of Warsaw that gets its name from her estate, Mon Coteau (My Hill). She was a lover of theatre and laid the foundation stone of the National Theatre in Warsaw, as well as maintaining a number of theatres in her palaces. The notion of theatre then had a much broader meaning than now. It included not only the theatre