Ero s onoga svijeta

Ero s onoga svijeta (usually translated as Ero the Joker, literally Ero from the other world) is Croatian comic opera in three acts by Jakov Gotovac, with a libretto by Milan Begović based on a folk tale. The genesis of the opera was at Vrlička Česma in the town of Vrlika, a hometown of Milan Begović.

According to Croatian musicologist Josip Andreis, Ero s onoga svijeta is "not only the most successful Croatian comic opera to this day, but also the only Croatian opera with a presence in the theaters abroad". American musicologist and music critic Ralph P. Locke described it as one of two major Croatian operas, alongside Nikola Šubić Zrinski.