From April 5 till April 10, 2013 on the Astronomical Center Rijeka will be part of the manifestation called  International Dark Sky Week. On Friday, 4/5/2013 at 8.30 PM, Saturday,  4/6/2013 at 8.30 PM and Tuesday, 4/9/2013 at  6.30 PM Croatian Association Cezar, association for  the promotion of  energy efficiency, will hold a lecture called "The beginnings of public lighting, the development and the future of it".