  The presence of exponential bulges and anti-truncated disks has been noticed
in many lenticular galaxies. In fact, it could be expected because the very
formation of S0 galaxies includes various processes of secular evolution. We
discuss how to distinguish between a pseudobulge and an anti-truncated disk,
and also what particular mechanisms may be responsible for the formation of
anti-truncated disks. Some bright examples of lenticular galaxies with the
multi-tiers exponential stellar structures are presented, among them -- two
central group giant S0s seen face-on and perfectly axisymmetric.
