  Ring galaxies are commonly known as objects where a burst of star formation
was triggered by a close encounter with an intruder, maybe a satellite galaxy.
BVRI CCD observations of five ring galaxies have been performed. Here we
present the results of a self-consistent approach to reproduce their observed
morphology and spectral energy distribution using updated $N$--body simulations
and evolutionary population synthesis models extending from UV to far--IR
wavelengths. Some suggestions about the evolutionary properties of these
starburst galaxies are then derived.
