Piotr Stefańczyk

85.52.Z - Non-school forms of artistic education

43.42.Z - Performing other specialized construction works related to the construction of buildings

71.20.C - Other technical testing and analysis

74.99.Z - All other professional, scientific and technical activities, not elsewhere classified

79.12.Z - Tour operator activities

85.59.B - Courses and training for acquiring knowledge, skills, and professional qualifications in non-school forms

85.69.Z - Educational support activities, not classified elsewhere

90.20.C - Activities related to the staging of artistic performances

90.39.Z - Other activities supporting creative activities and activities related to staging artistic performances

93.29.B - Other entertainment and recreational activities, not elsewhere classified

96.99.Z - Other individual services not classified elsewhere