The largest building on the site is the Matthew Kirtley Museum, named after the Midland Railway Company's first Locomotive and Carriage Superintendent who was appointed on the Railway's creation and was in charge of Derby works for the rest of his life. Inside the Museum is a unique collection of locomotives and rolling stock covering steam, diesel and electric power from the 1860s to the present day. Also housed in the building are several locomotives in storage and the Centre's running fleet of steam and diesel locomotives when not actually in service.