Renée Fleming is to perform an intimate one-off gig at Oxford's Sheldonian Theatre on 4 November to mark the beginning of her Humanitas Visiting Professorship (thanks to reader James for the tip-off). Appearing with her is the Oxford Philomusica conducted by Marios Papadopoulos. The programme has yet to be announced.
Tickets cost from £15 to £50 and can be bought on the Oxford Playhouse website. I strongly suggest you book soon; tickets went on sale today with almost no publicity and already many are gone.
As the seating details are not clear on the booking site, you may like to take a look at the photo and seating plan below before slapping down any money.
The artist performs in the are in the lower right hand corner of the photo below. The upper gallery is the top level. The lower gallery is the area directly below, behind the pillars. The semi-circle is the tiered seating in front of the lower gallery. Legroom is limited and all seating is fiendishly uncomfortable, by the way.
This plan may be a little out of date; also, I don't think there will be chairs, but it gives you a general idea: