Guido of Acqui was an 11th-century Italian bishop who led the diocese of Acqui in north-west Italy from 1034 until 1070. Born into the noble Counts of Acquesana family in Melazzo, he was orphaned during his youth and studied in Bologna. His leadership was characterized by efforts to reform the liturgy, spirituality, and moral standards of his clergy. He utilized his personal wealth to alleviate financial burdens within the diocese and to fund various religious and educational initiatives.
Life and work

As bishop, Guido worked to combat corruption by donating his own assets to the diocese. He supported the education of young women and established the nunnery of Santa Maria De Campis. One of his most significant achievements was the construction of the Acqui Cathedral, which was dedicated to the Madonna Assunta and consecrated in 1067.
Veneration

The saint died on 2 June 1070, and his remains are kept in the cathedral he commissioned. While the Roman Martyrology recognizes his death date as his feast day, the local community in Acqui celebrates him on the second Sunday of July.
