 In 1959 plans were therefore drawn up for an additional tract, which was constructed with great urgency starting in 1961.In December 1963 the whole ISH complex, with the capacity to house 468 students, was inaugurated and – thanks above all to the generosity of Max Kade, a German-born US businessman in the chemical and pharmaceutical industries and an international patron of science – became the unencumbered property of ISH.At the beginning of the 1970s a further extension was added to ISH when an adjoining building was demolished to make way for a new tract to accommodate 91 students.