A control system for monitoring a contact wire of an overhead power supplying line installed along an associated railway line, comprising at least: - a control and processing unit; - one or more sensors which are suitable to be mounted on board of a railway vehicle and are adapted to provide to the control and processing unit first signals (S det) indicative of one or more corresponding parameters (H, D, S) of said contact wire while the railway vehicle is travelling along the railway line; - one or more devices which are arranged to provide to the control and processing unit second signals (S P) suitable for calculating a position of the railway vehicle along the railway line; wherein said control and processing unit is configured for calculating: - based on at least the first signals (S det) provided via said one or more sensors, one or more actual values for said one or more parameters (H, D, S) of the contact wire; and - based on said second signals (S P) received from said one or more devices, the actual position (P a) of the railway vehicle along the railway line at which said actual values for said one or more parameters (H, D, S) of the contact wire have been calculated; wherein said one or more sensors comprise at least: - an optical transmitter and an associated optical receiver mutually arranged to provide signals (S det) indicative of an actual dimensional parameter (D a) of the contact wire, said optical transmitter and associated optical receiver comprising a pair of laser-based transmitter and associated receiver; and - a first optical sensor and a second optical sensor mutually arranged to provide signals (S det) indicative of an actual stagger (S a) of the contact wire with respect to a reference position, characterised in that said first optical sensor and second optical sensor comprising a first array of laser sensors and a corresponding second array of laser sensors spaced apart from the first array of laser sensors, and in that the control system further comprises a first software module configured to carry out a validation check for confirming the correctness of an identified portion of a contact wire, wherein said validation check is based on a correlation between the actual stagger value (S a) calculated by the control and processing unit for the identified portion and a predicted stagger value (S P) pre-calculated by the first software module for said identified portion. - a control and processing unit; - one or more sensors which are suitable to be mounted on board of a railway vehicle and are adapted to provide to the control and processing unit first signals (S det) indicative of one or more corresponding parameters (H, D, S) of said contact wire while the railway vehicle is travelling along the railway line; - one or more devices which are arranged to provide to the control and processing unit second signals (S P) suitable for calculating a position of the railway vehicle along the railway line; - based on at least the first signals (S det) provided via said one or more sensors, one or more actual values for said one or more parameters (H, D, S) of the contact wire; and - based on said second signals (S P) received from said one or more devices, the actual position (P a) of the railway vehicle along the railway line at which said actual values for said one or more parameters (H, D, S) of the contact wire have been calculated; - an optical transmitter and an associated optical receiver mutually arranged to provide signals (S det) indicative of an actual dimensional parameter (D a) of the contact wire, said optical transmitter and associated optical receiver comprising a pair of laser-based transmitter and associated receiver; and - a first optical sensor and a second optical sensor mutually arranged to provide signals (S det) indicative of an actual stagger (S a) of the contact wire with respect to a reference position,