Revolving Torsion at St Thomas Hospital

I think my favourite piece of transpontine sculpture is this work on the South side of Waterloo Bridge, in the grounds of St Thomas' Hospital.  'Revolving Torsion' by Naum Gabo was manufactured in steel to the artist's design by Stainless Metalcraft Ltd of London in 1972-3, and installed at the hospital with fountain in 1975. ...