CIS (Centre of Integrable Systems) is a regional Scientific & Educational Mathematical Centre in the city of Yaroslavl of the Russian Federation. It constitutes a subdivision of the P.G. Demidov Yaroslavl State University (YarSU). The Centre is founded within the framework of a state programme of the Ministry of Education and Science of the Russian Federation, project No. 1.10160.2017/NM. Currently, the staff members of CIS consist of scientists and lecturers from the Yaroslavl State University, the Steklov Mathematical Institute of the Russian Academy of Sciences (Moscow) and the University of Leeds (UK). Among the staff members there are full members of the Russian Academy of Sciences (RAS). This is the first Scientific & Educational Centre specialised in Integrable Systems in the world.