We present a spectroscopic atlas of active galactic nuclei covering the region around the \lambda \lambda 8498 , 8542 , 8662 Calcium triplet ( CaT ) . The sample comprises 78 objects , divided into 43 Seyfert 2s , 26 Seyfert 1s , 3 Starburst and 6 normal galaxies . The spectra pertain to the inner \sim 300 pc in radius , and thus sample the central kinematics and stellar populations of active galaxies . The data are used to measure stellar velocity dispersions ( \sigma _ { \star } ) both with cross-correlation and direct fitting methods . These measurements are found to be in good agreement with each-other and with those in previous studies for objects in common . The CaT equivalent width is also measured . We find average values and sample dispersions of W _ { CaT } of 4.6 \pm 2.0 , 7.0 \pm and 7.7 \pm 1.0 Å for Seyfert 1s , Seyfert 2s and normal galaxies , respectively . We further present an atlas of [ SIII ] \lambda 9069 emission line profiles for a subset of 40 galaxies . These data are analyzed in a companion paper which addresses the connection between stellar and Narrow Line Region kinematics , the behaviour of the CaT equivalent width as a function of \sigma _ { \star } , activity type and stellar population properties .