This book provides up-to-date information on metric (i.e. Killing, homothetic and conformal), connection (i.e. affine, conformal and projective), curvature collineations and curvature inheritance symmetries. It is the first-ever attempt to present a comprehensive account of a very large number of papers on symmetries of spacetimes and Riemannian manifolds. An attempt has been made to present the Lie group/algebra structures of symmetry vectors, their kinematics/dynamics, compact hypersurfaces (dealing with the initial value problem in general relativity) and lightlike hypersurfaces. This book also contains the latest information on symmetries of Kaehler, contact and globally framed manifolds. Audience: Graduate students, post-doctoral students and faculty interested in differential geometry and/or general relativity.