System for controlling the access of persons (P) at physical access regions (T), said system comprising: an identification medium (IM) having an identification code (IC) assigned to a person; a reading device (LV) for reading the identification code (IC), wherein the reading device (LV) is located at a physical access region (T), and wherein the reading device (LV) is configured to send the identification code (IC) read and the location (OPL) of the reading device (LV) to an access control server (ZKS); a positioning device (SAT, IPS) for determining the location (OPG) of a mobile device (MG) assigned to the person (P) ; the access control server (ZKS), wherein the access control server is configured to receive the identification code (IC) of the identification medium (IM) and the location (OPG) of the mobile device (MG), to compare the received location (OPG) of the mobile device (MG) with the location (OPL) of the reading device (LV), and to generate an access authorisation (ZA) for the person (P) if the location (OPG) of the mobile device (MG) assigned to the person (P) and the location (OPL) of the reading device (LV) match, and if a positive authentication of the person (P) on the basis of the identification code (IC) has been established, characterised in that an access authorisation (ZA) is provided for the person (P) by means of the access control server (ZKS) if the location (OPG) of the mobile device (MG) assigned to the person (P) and the location (OPL) of the reading device (LV) match, and a positive authentication of the person (P) on the basis of the identification code (IC) has occurred, wherein the location (OPG) of the mobile device (MG) assigned to the person (P) is provided by two different positioning devices (SAT, IPS), and that the two different positioning devices (SAT, IPS) determine the location (OPG) of the mobile device (MG) assigned to the person (P) in each case on the basis of different technologies or different positioning methods. an identification medium (IM) having an identification code (IC) assigned to a person; a reading device (LV) for reading the identification code (IC), wherein the reading device (LV) is located at a physical access region (T), and wherein the reading device (LV) is configured to send the identification code (IC) read and the location (OPL) of the reading device (LV) to an access control server (ZKS); a positioning device (SAT, IPS) for determining the location (OPG) of a mobile device (MG) assigned to the person (P) ; the access control server (ZKS), wherein the access control server is configured to receive the identification code (IC) of the identification medium (IM) and the location (OPG) of the mobile device (MG), to compare the received location (OPG) of the mobile device (MG) with the location (OPL) of the reading device (LV), and to generate an access authorisation (ZA) for the person (P) if the location (OPG) of the mobile device (MG) assigned to the person (P) and the location (OPL) of the reading device (LV) match, and if a positive authentication of the person (P) on the basis of the identification code (IC) has been established, characterised in that an access authorisation (ZA) is provided for the person (P) by means of the access control server (ZKS) if the location (OPG) of the mobile device (MG) assigned to the person (P) and the location (OPL) of the reading device (LV) match, and a positive authentication of the person (P) on the basis of the identification code (IC) has occurred, wherein the location (OPG) of the mobile device (MG) assigned to the person (P) is provided by two different positioning devices (SAT, IPS), and that the two different positioning devices (SAT, IPS) determine the location (OPG) of the mobile device (MG) assigned to the person (P) in each case on the basis of different technologies or different positioning methods. <EOS>