Main building In the main building, there are three seminar rooms and various seminar and group rooms for seminars, workshops, presentations and smaller congresses. The main building is the centerpiece of the campus and was opened in 1995. In addition to the three plenary halls and the seminar and group rooms the spacious foyers offer ample space for personal exchange. The reception in the ground floor is the point of contact for questions and administrative concerns and the check-in and check-out for overnight guests in the HSG Alumni House. In the basement there is a coffee bar as well as the staffed break areas. At lunchtime we offer a lunch buffet with a fresh and balanced seasonal cuisine at the Restaurant Intermezzo.