Giovanni Battista Gisleni (Jan Baptysta Gisleni, Gislenius, Ghisleni) (1600 – 3 May 1672) was an Italian Baroque architect, stage designer, theater director, singer, and musician at the Polish royal court.
Gisleni was born and died in Rome. He served three Polish kings of the Vasa dynasty: Zygmunt III Waza, Władysław IV Waza and Jan II Kazimierz, during the years 1630-1668. Gisleni's tomb in the church of Santa Maria del Popolo in Rome takes the form of a memento mori, showing an intricately carved skeleton figure of Death.