 Hebart Hall was used as a residence for lecturers and tertiary boarders and the gymnasium-lecture hall ("Angas Hall") for the chapel until its conversion to the library in 1960.With the amalgamation of the UELCA and the Evangelical Lutheran Church in Australia (ELCA) in 1966 came the amalgamation of the ELCA's seminary (Concordia, where the secondary school is still situated) and the UELCA's North Adelaide seminary.In 1967 extensive building programs began, including additions to the library, the erection of a new boarding house (Graebner Hall) and demolition of the old grammar school to make way for a refectory and extra accommodation (Hamann Hall).