Cheese grater

Part of the Attenborough Building at Leicester Uni (the sloping windows help ventilation).
Visited today as part of son Sam's tour of UCAS choices (a little too far away, nice campus, nice department, dreadful computer 'labs', curriculum not quite right for us).
The building (not Sam's department) apparently has a Paternoster lift - alas our tour didn't include a go on it.