  The present Chapter discusses methods by which topological Bloch bands can be
prepared in cold-atom setups. Focusing on the case of Chern bands for
two-dimensional systems, we describe how topological properties can be
triggered by driving atomic gases, either by dressing internal levels with
light or through time-periodic modulations. We illustrate these methods with
concrete examples, and we discuss recent experiments where geometrical and
topological band properties have been identified.
