2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/10702I review what we have learned about the BLR from reverberation mapping, point to some problems and complications that have emerged, and outline some future directions.LaTex, 8 pages, incl. 3 figures and .sty files, to appear in the proceedings of IAU Colloquium 159, Shanghai, June 1996. "Emission Lines in Active Galaxies: New Methods and Techniques", eds. B.M. Peterson, F.-Z. Cheng, and A.S. Wilson (Astronomical Society of the Pacific: San Francisco)Astrophysicstext