Arialdo [SEP] canonization status
Arialdo
Saint Arialdo (c. 1010 – June 27, 1066) is a Christian saint of the eleventh century. He was assassinated because of his efforts to reform the Milanese clergy.
Life.
Arialdo was the child of a noble family, born at "Cutiacum" (Cucciago), near Como. After studying in Laon and Paris, he was made a canon in the cathedral city of Milan. According to Andrea da Parma, abbot of San Fedele di Strumi, who wrote a "Vita" concerning Arialdo
, the church in Milan was rife with immoral clerics, fornicating, sleeping with prostitutes, lending money, and selling indulgences. According to Henry Charles Lea. marriage was common place among the Milanese clergy. 
Together with Bishop of Lucca Anselmo da Baggio (later Pope Alexander II), Arialdo headed the pataria, a movement that sought to reform Milan's simoniacal clergy. Due to this, he was excommunicated by the Bishop of Milan Guido da Velate. Pope Stephen IX removed the excommunication and Arialdo returned to Milan to continue