Saint Arialdus of Milan

bas-relief of the martyrdom of Saint Arialdus of Milan, date unknown, artist unknown; San Calimero church, Milan, Italy; photographed on 5 May 2007 by Giovanni Dall'Orto; swiped from Wikimedia CommonsAlso known as

  • Arialdo



Well-educated deacon in the archdiocese of Milan, Italy. Taught at the cathedral school of Milan. Led the Pataria, the anti-nicolaism and anti-simony efforts in Milan, begining in 1057. He had the support of the Vatican, but was opposed by his simoniac archbishop Guido da Velate. More than just a theological argument, the dispute led to violence. Arialdus went into hiding outside the city, Pope Alexander II excommunicated the archbishop who then had Arialdus arrested, imprisoned and executed. Martyr.



MLA Citation

  • “Saint Arialdus of Milan“. CatholicSaints.Info. 1 February 2019. Web. 23 April 2021. <>