Open for productions only, in general, the theater is closed to visitors, except in July, English tours are conducted every hour on the hour.-sun 11:00 - 14:00, all you need to do is show up and pay 20zl, the tour lasts about an hour. Outside of the summer, guided tours can be arranged by phone (150zl for up to 50 people).
If you go to a show and ready to splurge, you can book a VIP lounge with extra services for 500zl (four people maximum, Fri and Sat performances only). Box office opening hours are erratic, so check their web site.
Juliusz Slowacki Theatre in Krakow, Poland, (Polish: Teatr im. Juliusza Slowackiego w Krakowie), erected in 1893, was modeled after some of the best European Baroque theatres such as the Paris Opera designed by Charles Garnier, and named after Polish poet Juliusz Slowacki in 1909.