While Gorm the Old had disparaging nicknames, his wife Thyra was referred to as a woman of great prudence. Saxo wrote that Thyra was mainly responsible for building the Dannevirke on the southern border, but archeology has proven it much older.
Gorm and Thyra were buried under one of the two great mounds at Jelling and later moved to the first Christian church there. This was confirmed when a tomb containing their remains was excavated in 1978 under the east end of the present church.
There are contradictory accounts of Thyra's parentage. Saxo holds she was the daughter of Æthelred, King of England but Snorri says her father was a king or jarl of Jutland or Holstein called Harald Klak. Thyra predeceased Gorm.
Tradition also has it that before Thyra consented to marry Gorm, she insisted he build a new house and sleep in it for the first three nights of winter and give her an account of his dreams those nights. The dreams were told at the wedding banquet and as recorded, imitate the dreams Pharaoh had that were interpreted by Joseph in Genesis. Oxen came out of the sea (bountiful harvest) and birds (glory of the king to be born).