"Bertha of Holland (c. 1055 \u2013 1093), also known as Berthe or Bertha of Frisia and erroneously as Berta or Bertrada, was queen consort of the Franks from 1072 until 1092, as the first wife of King Philip I. Bertha's marriage to the king in 1072 was a result of peace negotiations between him and her stepfather, Count Robert the Frisian of Flanders. After nine years of childlessness, the royal couple had three children, including Philip's successor, Louis the Fat."@en . . . . "1093-07-30Z"^^ . . . "1072Z"^^ . . "1092Z"^^ . .