Opera and theater Madlenianum is the first private opera and theater company in both Serbia and South East Europe. It was founded by Madeleine Cepter, wife of Philip Cepter, a Serbian businessman. Madlenian's name comes from the name Madlene Cepter.
Madlenianum was founded on January 26, 1999, in a building where previously there was a second building of the National Theater in Belgrade. After seven years of operation and five different stages of reconstruction, on April 19, 2005, a completely renovated, reconstructed and conceptually enriched building opened its doors to the public. It is located in the old town of Zemun, which is a spatial cultural and historical part of the city. The theater features opera, ballet, concerts, as well as a drama and music program.