'Turning The Place Over' by Richard Wilson

Turning the Place Over consists of an 8 metres diameter ovoid cut from the facade of a building in Liverpool city centre and made to oscillate in three dimensions. The revolving façade rests on a specially designed giant rotator, usually used in the shipping and nuclear industries, and acts as a huge opening and closing ‘window’, offering recurrent glimpses of the interior during its constant cycle during daylight hours.

Direct link to historic imagery below (goo.gl)