  The observations and interpretation of broad iron lines in the X-ray spectra
of Seyfert 1 galaxies are reviewed. The line profiles observed from
MCG--6-30-15 and NGC 3516 show extended red wings to the line explained by
large gravitational redshifts. The results are consistent with the emission
expected from an X-ray irradiated flat accretion disc orbiting very close to a
black hole. Results from XMM-Newton and Chandra are presented and the
possibility of broad oxygen lines discussed.
