Maria de Rudenz is a dramma tragico, or tragic opera, in three parts by Gaetano Donizetti.

The Italian libretto was written by Salvadore Cammarano, based on "a piece of Gothic horror",[1] La nonne sanglante by Auguste Anicet-Bourgeois and Julien de Mallian, and The Monk by Matthew Gregory Lewis.

[3] The first staged presentations in the 20th century took place at La Fenice beginning on 21 December 1980 with Katia Ricciarelli in the title role.

[6] Maria de Rudenz falls in love with Corrado against her father's wishes and flees with him to Venice.

Maria returns to her ancestor's castle and discovers that her lover is not only going to marry her cousin, but that in fact he is also the son of a murderer.