Why All Souls' Day was established by this Benedictine monk --Aleteia

Why All Souls' Day was established by this Benedictine monk --Aleteia: All Souls Day has a fascinating history, one that can be traced back to the 10th century and the initiative of St. Odilo of Cluny. St. Odilo was a holy abbot of a Benedictine monastery located in C…