Covering panel ( 51, 51 ') for buildings, the outer surface of which forms a major front face and a major rear face, and this panel ( 51, 51') comprises: - a ferromagnetic layer ( 54, 54 ') containing ferromagnetic material; - one or more structural layers ( 52, 53, 56) made of one or more materials which are substantially non-ferromagnetic; - a signal light, which is visible, at least when it is on, observing the major front face of the covering panel ( 51, 51 ') from the outside; - one or more wireless power supply stations, each of which is arranged for supplying electrical power to one or more electrical or electronic devices, wherein the signal light is arranged at or close to one of the wireless power supply stations, for example at or close to its possible inductor ( 57 C) or capacitive plate, to allow a user to easily find the position of the power supply station, even though it is hidden in or behind the covering panel ( 51, 51 '), wherein - the signal light is arranged inside or behind at least one of the structural layers ( 52, 53, 56) and/or the ferromagnetic layer ( 54, 54 '), and comprises a light source arranged inside or behind the first structural layer ( 52, 53, 56) and/or the ferromagnetic layer; - said covering panel ( 51, 51') comprises a substantially transparent or translucent protective shield that covers the light source and allows the emitted light from outside of the same panel ( 51, 51 ') to be seen or glimpsed; - the protective shield extends, at least partially, across at least one of the one or more structural layers ( 52, 53, 56) and/or across the ferromagnetic layer ( 54, 54'); - the protective shield comprises a pin or other insert fitted with interference or screwed into at least one of the one or more structural layers ( 52, 53, 56) and/or through the ferromagnetic layer ( 54, 54 '). - a ferromagnetic layer ( 54, 54 ') containing ferromagnetic material; - one or more structural layers ( 52, 53, 56) made of one or more materials which are substantially non-ferromagnetic; - a signal light, which is visible, at least when it is on, observing the major front face of the covering panel ( 51, 51 ') from the outside; - one or more wireless power supply stations, each of which is arranged for supplying electrical power to one or more electrical or electronic devices, wherein the signal light is arranged at or close to one of the wireless power supply stations, for example at or close to its possible inductor ( 57 C) or capacitive plate, to allow a user to easily find the position of the power supply station, even though it is hidden in or behind the covering panel ( 51, 51 '), wherein - the signal light is arranged inside or behind at least one of the structural layers ( 52, 53, 56) and/or the ferromagnetic layer ( 54, 54 '), and comprises a light source arranged inside or behind the first structural layer ( 52, 53, 56) and/or the ferromagnetic layer; - said covering panel ( 51, 51') comprises a substantially transparent or translucent protective shield that covers the light source and allows the emitted light from outside of the same panel ( 51, 51 ') to be seen or glimpsed; - the protective shield extends, at least partially, across at least one of the one or more structural layers ( 52, 53, 56) and/or across the ferromagnetic layer ( 54, 54'); - the protective shield comprises a pin or other insert fitted with interference or screwed into at least one of the one or more structural layers ( 52, 53, 56) and/or through the ferromagnetic layer ( 54, 54 ').