  This paper is dedicated to the memory of Vilen Mitrofanovich Strutinsky who
would have been 80 this year. His achievements in theoretical nuclear physics
are briefly summarized. I discuss in more detail the most successful and
far-reaching of them, namely (1) the shell-correction method and (2) the
extension of Gutzwiller's semiclassical theory of shell structure and its
application to finite fermionic systems, and mention some applications in other
domains of physics.

Nuclear Theory