Wulfthryth continued to have considerable influence upon Edgar after her return to Wilton. She was able to stop bailiffs from arresting a thief who had taken sanctuary in the Abbey and was able to secure the release of two Wilton priests who had been imprisoned by the reeve of Wilton. As Abbess of Wilton, she built a stone wall around the Abbey and also used her wealth to build up the abbey's collection of relics. Goscelin calls her the "hidden treasure and light" of the Abbey, and she was held in high esteem during her life. and she is credited with miracles during her lifetime, and Alms giving. Both Wulfthryth and her daughter Edith were regarded as saints after their lifetimes. Wulfthryth died at Wilton on 21 September, probably in the year 1000, and was buried before the main altar of the Wilton Abbey church. Her Feast Day is 13 September.