The most well-known MRPT is probably the CAS second-order PT (CASPT2) method, but many other versions exist, such as (extended) multiconfiguration quasi-degenerate PT2 [(X)MCQDPT2], n-electron valence state PT2 (NEVPT2), generalized Van Vleck PT2 (GVVPT2), retaining the excitation degree PT, unitary group adapted state-specific MRPT, and driven similarity renormalization group state-averaged MRPT (SA-DSRG-MRPT2). There is no doubt that analytic derivatives are most convenient to locate minimum energy structures, such that analytic gradient theories and programs have been developed for a variety of MRPTs, namely CASPT2, GVVPT2, 24 NEVPT2, (X)MCQDPT2, and (SA-)DSRG-MRPT2. Another type of multiconfigurational approach, such as multiconfiguration pair-density functional theory (MC-PDFT), has analytic derivative theories as well.