 She gave the first of two great endowments to its construction, enabling the abbey and a large new Church of the Holy Cross to be built.Though no charters survive, in "Life of Saint Balthild", there are references to the gifts she made to the abbey.Balthild and the abbesses quickly established an impressive reputation for encouraging learning, which attracted monks to Chelles and resulted in its conversion to a double monastery by the end of the 7th century.