Tombs of the Blind Dead

In the first Blind Dead movie, Tombs of the Blind Dead, released in 1971, a young barefoot woman is brought to the castle of the Knights Templar.

She's brought inside to a large banquet hall, but she's not to join the party. Instead she's the main event.

Two of the Templars (in their pre-dead state) bind her to an X-shaped rack.

It's only when she is secured to the rack that her clothes are removed, revealing underwear that covers as much as her outer clothes did.

Unfortunately, she does not survive her sacrificial ritual, where the knights ride around her, slicing at her with their swords--it's stuff like this that's probably why they became the undead in the first place. "Do you want to become the undead? Because that's how you become the undead!"

According to the IMDB, the maiden is played by Carmen Yazalde, who previously went unaccredited. Nice job, Carmen!