Serbia has a well-established theatrical tradition with Joakim Vujić considered the founder of modern Serbian theatre. Serbia has 38 professional theatres and 11 theatres for children, the most important of which are National Theatre in Belgrade, Serbian National Theatre in Novi Sad, National Theatre in Subotica, National Theatre in Niš and Knjaževsko-srpski teatar in Kragujevac (the oldest theatre in Serbia, established in 1835). The Belgrade International Theatre Festival – BITEF, founded in 1967, is one of the oldest theatre festivals in the world, and it has become one of the five biggest European festivals. Sterijino pozorje is, on the other hand, festival showcasing national drama plays. The most important Serbian playwrighters were Jovan Sterija Popović and Branislav Nušić, while recent renowned names are Dušan Kovačević and Biljana Srbljanović.