On the corner between Princes Street and Elm Hill, visitors will walk past a beautiful old church and a strange imprint on the ground that resembles a keyboard. The imprint has been at this location for several decades. Some believe it’s a computer keyboard, others swear it’s an 18th-century print plate from a monastery. The Norwich keyboard is actually an imprint of an old Amstrad PC. The most popular urban myth surrounding its creation is that a keyboard fell from a truck into wet cement. Of course this was not…