The history of roundhouse is linked to the Entroncamento city’s evolution and other buildings that form part of the railway complex. It was built on the site of the original building, demolished in 1976. Here, the locomotives were stabled between workings or whilst waiting for overhaul or repair at the old steam workshops.
From the original building, the 1911 turntable is preserved and still operational, with 14 lines converging on to it. This installation is used to reverse locomotives’ direction of travel.