  The goal of this manuscript is to give an introduction into the design of the
magnet lattice and as a consequence into the transverse dynamics of the
particles in a synchrotron or storage ring. Starting from the basic principles
of how to design the geometry of the ring we will briefly review the transverse
motion of the particles and apply this knowledge to study the layout and
optimization of the principal elements, namely the lattice cells. The detailed
arrangement of the accelerator magnets within the cells is explained and will
be used to calculate well defined and predictable beam parameters. The more
specific treatment of low beta insertions is included as well as the concept of
dispersion suppressors that are an indispensable part of modern collider rings.
