  This is a historical review covering the last 30 years of the observational
study of lenticular galaxies at the 6m telescope BTA of the Special
Astrophysical Observatory of the Russian Academy of Sciences. The development
of spectroscopic techniques at the BTA has allowed to get comprehensive
information about this class of stellar systems, starting from the study of
their nuclei in the late 80th towards quite exclusive results obtained in the
last years on the outermost parts of their large-scale stellar disks.
