For many years, the station was known for the elaborate edifice [es] that housed the elevators, built by the architect Antonio Palacios.

During the works, the original remains of said temple appeared, specifically the elevator shaft, located at the end of Calle Montera and Gran Vía.

[7][8] In this section, the actions carried out were: the waterproofing and consolidation of the tunnel, the oldest in the Madrid underground, which was reinforced by means of cement injections and special concrete projections with metal support meshes, and the installation of the rigid catenary, as well as the assembly of the rest of the facilities and services.

[4][10] The delay was caused by the finding of the remains of the Palacios elevator and stairs and a collapse risk of the tunnel to the commuter railway station.

[11] Originally, the completion date of the works was scheduled for April 2019,[12] but later it was delayed to mid-October,[13] the first quarter of 2020,[12] March 2020[14] and "late 2020 or early 2021".