El Círculo Theater (in Spanish, Teatro El Círculo) is a theater in Rosario, Argentina.It is located near the historical center of the city, at the intersection of Laprida and Mendoza Streets. Planned as a lyric theater, it was developed as Teatro La Ópera by Emilio O. Schiffner, who purchased the society of the same name in 1889. Schiffner contracted German engineer George Goldammer, an acoustician who modified the original design, and the construction firm of Bianchi, Vila y Compañía. Following delays caused by the Panic of 1890, as well as the earlier society's debts, the theatre was started in 1903. Italian artists, directed by Luggi Levoni, decorated both the interiors and exteriors; among their notable creations was the stage curtain designed by Giuseppe Carmignani with images from Greek mythology similar to those found in the Teatro Regio di Parma.