Rowan Atkinson wore the black leather codpiece throughout the series
A codpiece worn by Rowan Atkinson in the 1986 TV series Blackadder, set in medieval times, is being auctioned in Berkshire.
The codpiece was a covering at the front of the crotch and formed an essential part of the well-dressed Elizabethan man's wardrobe.
It accentuated the genital area and was held closed by string ties or buttons.
The garment is expected to sell for £1,000 at the TV and Film Costumes auction at Cameo in Midgham on Sunday.
Jon King, from Cameo, said: "This is possibly the most iconic costume item in the series.
"There is a lot of interest world-wide in this auction, as we are live on the computer as well as selling in the room."
Other lots being auctioned include the khaki ski suit used by Pierce Brosnan as James Bond in The World is Not Enough in 1999. It is expected to fetch up to £1,500.
A medieval tunic with studs worn by Sean Connery as Robin Hood in the film Robin and Marian in 1976 is expected to sell for up to £200.
Several other items from James Bond films, Doctor Who and Comic Relief will also feature.