  This is a report on the work of Robert Langlands, following his award of the
Abel Prize in 2018. It includes his contributions to the general areas of
Representation Theory, Automorphic Forms, Number Theory and Arithmetic
Geometry. We have tried to communicate the remarkable continuity that runs
throughout all of his work, with its roots in several fundamental areas of
mathematics. What is now known as the Langlands Program represents a
unification of some of the deepest parts of these areas. We hope that at least
some parts of the report will be accessible to a broader mathematical audience.
Other parts will inevitably be more difficult. However, we can also hope that
the report is presented in such a way as to lead to a better understanding of
all sides of Langlands' work.
