Question: When did Guglielma Pallavicini's mother die?
Answer: 1323

Maria dalle Carceri (died 1323) was sovereign marchioness of Bodonitsa from 1311 until 1323. She succeeded her late spouse Albert Pallavicini on his death in 1311. While she avoided submitting her principality to the Catalan Company, she could not avoid paying an annual tribute of four destriers