St. Petersburg Workers' Organisation organisation were carried in "Rabochaya Mysl" No. 11 in April 1901. St. Petersburg Workers' Organisation St. Petersburg Workers' Organisation was a socialist group, oriented towards economism, in St. Petersburg, Russian Empire. It was set up in the summer of 1900. Its appeal 'To the Workers of All Factories', published in its newspaper "Rabochaya Mysl" (, "Workers' Thought") No. 9, September 1900, called on the workers to organise circles for the working out of a programme of struggle and for mutual assistance. In the autumn of 1900, the Workers' Organisation merged with the St. Petersburg League of Struggle for the Emancipation
20th-century classical music explored in their respective articles. At the end of the 19th century (often called the "Fin de siècle"), the Romantic style was starting to break apart, moving along various parallel courses, such as Impressionism and Post-romanticism. In the 20th century, the different styles that emerged from the music of the previous century influenced composers to follow new trends, sometimes as a reaction to that music, sometimes as an extension of it, and both trends co-existed well into the 20th century. The former trends, such as Expressionism are discussed later. In the early part of the 20th century, many composers wrote