Saint Patrick's Purgatory is a dramatic poem by Spanish playwright Pedro Calderón de la Barca that tells the story of Saint Patrick of Ireland. The work depicts the complex spiritual struggle of the saint, who appears in the mission of cleansing the souls of the dead. "St. Patrick's Purgatory" is full of deep philosophical undertones, reflects on eternal values, faith and repentance. This spiritual metaphor captivates readers with its profound symbolism and poetic language, revealing important themes of salvation and forgiveness.