Process of making a structure of reinforced cementitious material, said process comprising at least the following steps: - making, by a three-dimensional printing process, a plurality of modules of cementitious material, said three-dimensional printing process comprising a step of depositing a plurality of layers of cementitious material one on the other according to a stratification direction, said plurality of modules comprising: o at least one first module comprising at least one lateral wall delimited by an outer surface and extending along the stratification direction, at least part of said outer lateral surface of the first module defining a reciprocal coupling surface, said first module further comprising at least one hooking portion defining at least one cavity extending at least partially along the stratification direction, o at least one second module comprising at least one lateral wall delimited by an outer surface and extending along the stratification direction, at least part of the outer surface of the second module defining a reciprocal coupling surface countershaped to the reciprocal coupling surface of the outer surface of the first module, said second module further comprising at least one hooking portion defining at least one cavity extending at least partially along the stratification direction, - bringing in contact the first and second modules (2, 5) so that the respective coupling reciprocal surfaces (3b, 6b) of said modules abut on each other, - following the step of contacting the first and second modules, engaging at least one connecting element, on one side, inside the cavity of the hooking portion of the first module and, on the other side, inside the cavity of the hooking portion of the second module, said connecting element stably constraining the first and second modules (2, 5) and being configured for holding these latter in contact with each other. - making, by a three-dimensional printing process, a plurality of modules of cementitious material, said three-dimensional printing process comprising a step of depositing a plurality of layers of cementitious material one on the other according to a stratification direction, said plurality of modules comprising: o at least one first module comprising at least one lateral wall delimited by an outer surface and extending along the stratification direction, at least part of said outer lateral surface of the first module defining a reciprocal coupling surface, said first module further comprising at least one hooking portion defining at least one cavity extending at least partially along the stratification direction, o at least one second module comprising at least one lateral wall delimited by an outer surface and extending along the stratification direction, at least part of the outer surface of the second module defining a reciprocal coupling surface countershaped to the reciprocal coupling surface of the outer surface of the first module, said second module further comprising at least one hooking portion defining at least one cavity extending at least partially along the stratification direction, o at least one first module comprising at least one lateral wall delimited by an outer surface and extending along the stratification direction, at least part of said outer lateral surface of the first module defining a reciprocal coupling surface, said first module further comprising at least one hooking portion defining at least one cavity extending at least partially along the stratification direction, o at least one second module comprising at least one lateral wall delimited by an outer surface and extending along the stratification direction, at least part of the outer surface of the second module defining a reciprocal coupling surface countershaped to the reciprocal coupling surface of the outer surface of the first module, said second module further comprising at least one hooking portion defining at least one cavity extending at least partially along the stratification direction, - bringing in contact the first and second modules (2, 5) so that the respective coupling reciprocal surfaces (3b, 6b) of said modules abut on each other, - following the step of contacting the first and second modules, engaging at least one connecting element, on one side, inside the cavity of the hooking portion of the first module and, on the other side, inside the cavity of the hooking portion of the second module, said connecting element stably constraining the first and second modules (2, 5) and being configured for holding these latter in contact with each other.