Concerts and Opera Performances in Warsaw, September 2025. The Four Seasons — Antonio Vivaldi Warsaw, Staszic Palace Mirror Room Sat 20 Sep 2025, 16:00 Tickets from $ 35 Info & tickets Freddie Mercury Rock ‐Operally Warsaw, Staszic Palace Mirror Room Sat 20 Sep 2025, 20:00 + more dates Tickets from $ 35 Info & tickets Musical biography of Frank Sinatra Warsaw, Staszic Palace Mirror Room Sat 20 Sep 2025, 18:00 Tickets from $ 35 Info & tickets