  A saddle loop is a germ of a holomorphic foliation near a homoclinic saddle
connection. We prove that they are classied by their Poincar{\'e} rst-return
map. We also prove that they are formally rigid when the Poincar{\'e} map is
multivalued. Finally, we provide a list of all analytic classes of
Liouville-integrable saddle loops.
