Hry o Marii ("The Plays of Mary", sometimes referred to as "The Miracle of Our Lady") is a Czech-language opera cycle in four parts, by Bohuslav Martinů. The first performance was on 23 February 1935 at the National Theatre in Brno, with Antonín Balatka conducting, and stage direction by Rudolf Walter. It has been described as "a work of great originality, unlike any other opera" and "imbued with a strange mysticism".