  Text of a (pre-dinner) lecture at the Bielefeld workshop "Discrete Categories
in Representation Theory", April 20 - 21, 2018. This workshop was organized in
order to celebrate the 60th birthday of Dieter Vossieck: his famous paper "The
algebras with discrete derived category" has to be seen as the starting point
of a development which is discussed in this workshop. Dieter Vossieck has
published only few papers, but his influence is much larger. We outline some of
these contributions.

Representation Theory;History and Overview