[en] This paper reports on simple quark models, a baryon which consists of three quarks moving in a confined volume, and a mesons, bound quark-antiquark system The quarks are taken to be point spin-1/2 particles, each of three colours and coming in flavours of up (u), down (d), strange (s), charm (c), bottom (b), and top (t). evidence that a proton has such point-like spin-1/2 constituents and other bosonic degrees of freedom (i.e. gluons) come from deep inelastic scatterings of leptons off proton targets. In the simple quark models, one assumes that the low-energy properties of the baryon may be described by the interplay of the three valence quarks alone The bosonic degrees of freedom in this picture only give rise to the interaction between the quarks through virtual gluon exchange but are not manifest otherwise. This point of view seems to work well in the description of the ground state properties, in the counting of low-lying excited states and even in detailed spectroscopy