[en] The experimental studies of Radiative (REC) as well as of Resonant Electron Capture (RTE) into highly charged high-Z ions are reviewed. For REC, total and subshell differential cross sections are presented. In particular, the data of an L subshell resolved angular distribution measurement performed for He-like uranium are discussed. The comparison with exact relativistic calculations reveals that such investigations are very sensitive to the final state wave functions and provide unique information on magnetic interactions occuring in relativistic ion-atom collisions. For Resonant Capture the results of a subshell as well as angular differential measurement of KLL-RTE in U⁹⁰⁺→C collisions are given. The comparison with a full relativistic treatment underlines the importance of the Breit interaction for such high-Z few electron systems. Moreover, the data exhibit a strong anisotropy for Kα₁ transitions associated with the KL_1/2L_3/2 intermediate states. (orig.)