Alfonso IV d'Este was Duke of Modena and Reggio from 1658 until his death. He was the father of Mary of Modena, consort of James II of England.
- Occupation
- aristocrat, art collector
- Position held
- Duke of Ferrara and of Modena
- Born
- October 14, 1634, February 2, 1634
- Died
- July 16, 1662