In 1960, Dorothy Annan (1908-83) was commissioned by the Ministry of Works to create a mural to line the front of a building on Farringdon Street which housed London's largest telephone exchange. Her mural, listed in 2011, was moved in 2013 to the Cromwell High Walk in the Barbican where the scale of the work and the details of the panels on telecommunications themes (pylons, generators, telegraph poles etc) can be appreciated in full and at leisure.