Feast of St. Waldetrudis, foundress, daughter of Sts. Walbert and Bertilia, Married to Madelgaire, Count of Hainault, mother of Sts. Landericus, Madalberta, Adeltrudis and Dentelin. Founded the convent of Sainte-Waudru. The city of Mons grew around it. Patron of Mons, Belgium