The Siege Perilous was the name for the empty seat where?

More Questions:

What city is signified by the "D" stamped on some US coins?

Taekwondo was developed in what country?

Who is Prospero's daughter in Shakespeare's "The Tempest"?

Which US state is home to the southernmost reaches of the Appalachian Mountains?

What major river runs through the city of London?

Ageusia is the loss of which sense?

Seafloor spreading at midoceanic ridges is how scientists first discovered the periodic reversal of what?

What is the name of a small object orbiting the sun made of ice, dust and frozen gas?

What name is given to trees that lose their leaves annually?

What is the study of moths and butterflies called?

What is the technical term for an organism that eats other organisms as food?

What kind of bird is an eider?

Which band member of Red Hot Chili Peppers died of drug overdose?

What is the title of the bugle tune sounded as the introduction to a horse race?

Who sang alongside Stevie Nicks on the hit single "Leather and Lace"?