its peak the Centre employed more than 1,200 engineers, technicians, craftsmen and support staff. It was also home to the Marconi Company's museum containing numerous original artifacts from the pioneering period of Guglielmo Marconi's work on wireless telegraphy. The site still includes a prominent local landmark, a -high (110 m) former Chain Home radar tower visible across the surrounding countryside. The last remaining tower maintaining all of its platforms, the tower was given a Grade II listed status by Historic England in October 2019. Notable Marconi Research employees and scientists Sir Christopher Cockerell Sir Eric Eastwood, FRS Thomas Eckersley, FRS Frank Farmer Bernard de Neumann Peter Wright, author of Spycatcher Tony Sale, reconstructor of the Colossus computer References External links BAE Systems AI Labs official site BAE Systems research and development Buildings and structures in the City of Chelmsford Companies based in the City of Chelmsford Engineering research institutes General Electric Company Guglielmo Marconi History of telecommunications in the United Kingdom Military history of Essex Research and development in the United Kingdom Science and technology in Essex Telecommunications in World War II