  I review the expected Galactic sources of gravitational waves, concentrating
on the low-frequency domain and summarise the current observational and
theoretical knowledge we have. A model for the Galactic population of close
binaries, which is tested against the observations is used to predict the
expected signal for the future space based gravitational wave detector LISA.
With a simple model for the electro-magnetic emission from the same binaries I
argue that a fair number of the LISA systems have electro-magnetic
counterparts, which can be used to improve in particular the distance and mass
measurements of these systems by LISA. Furthermore, LISA will enable us to test
some aspects of the theory of binary evolution that are very difficult to asses
in different ways.
