These Lecture Notes are based partly on a lecture given by one of us (H. R. ) at Tiibingen University in Spring 1991 and partly on a lecture given at the f Egyptian-German Spring School "Particle and Nuclear Phyic I' in Cairo in April 1992. They are addressed to graduate students and young esearch workers in theoretical physics. Some knowledge ofquantum field theory, especially on func- tional integral techniques, are required. These Notes are intended to give a ped- agogical introduction into the description of hadrons, Le. , mesons and baryons, within a quark model based on a chirally...