English: A round table in a round house In 1840 the North Midland Railway opened its line from Derby via Chesterfield and Rotherham (but not Sheffield)to Leeds and needed somewhere to keep its locomotives when not in use. So, at the back of their offices in Derby they erected this circular engine shed with a central turntable, an entrance track from the outside world and fifteen short sidings, each of which would take one engine. As locomotives evolved and became more powerful and therefore bigger, they became too large to fit comfortably in this shed and newer sheds were built nearby. Amazingly, however, this shed survived for other purposes — the yellow crane above the turntable is a later addition — and today has seen nearly 170 summers and winters come and go to become the oldest engine surviving in Britain.