Moreover, we would like to point out that for a complex electronic system like a Chl molecule, it is very hard to reach the global minimum of the ground state geometry within a QM/MM fashion. Hence, it is not unlikely that the QM/MM-minimized structures presented here can potentially still deviate from the global minimum. Subsequently, the optimized geometries have been utilized for the excitation energy calculations also in a QM/MM setting based on various QM levels such as semi-empirical, LC-DFT functionals and multireference methods.