  Star cluster formation is a major mode of star formation in the extreme
conditions of interacting galaxies and violent starbursts. These newly-formed
clusters are built from recycled gas, pre-enriched to various levels within the
interacting galaxies. Hence, star clusters of different ages represent a fossil
record of the chemical enrichment history of their host galaxy, as well as of
the host galaxy's violent star formation history. We present a new set of
evolutionary synthesis models of our GALEV code, specifically developed to
include the gaseous emission of presently forming star clusters, and a new tool
to analyse multi-color observations with our models. First results for
newly-born clusters in the dwarf starburst galaxy NGC 1569 are presented.
