Id the blanked out.

All of these is a sensation

Id this famous building or should I say that it's a worship place

What is blanked out

Xing is a term describing the age-related spots and browning seen on vintage paper documents such as books, postage stamps, certificates, and so forth. The name may derive from the Y-like reddish-brown color of the stains, or the rust chemical ferric oxide which may be involved. Paper so affected is said to be "Xed."

Id X as well as Y No copy pasting in google