Which opera has more acts, Le prophète or La scala di seta?
La scala di seta La scala di seta (The Silken Ladder or Die seidene Leiter) is an operatic "farsa comica" in one act by Gioachino Rossini to a libretto by Giuseppe Maria Foppa. It was first performed in Venice, Italy, at the Teatro San Moisè on 9 May 1812. The overture has been frequently recorded and continues to be featured in the modern concert repertoire.
Der Sturm (opera) Der Sturm (The tempest) is a German-language opera in three acts by the Swiss composer Frank Martin to a libretto based on the Schlegel/Tieck German translation of Shakespeare's play "The Tempest". It was premiered at the Vienna State Opera in 1955. The role of Prospero was originally conceived for Dietrich Fischer-Dieskau, but illness prevented him participating.