Hello
Can anyone help me to understand what the attached items are?

They appear to be prints of famous artists drawings but I am
Confused as to why each has it's own “PLATE #” with titles, various
Museums and galleries listed on the bottom of each sheet.
Also, what might they have been used for?

Attached are three different plates, but I have inherited over a hundred.

Thanking you in advance for your help.

Respectfully
Dove1

They might be illustrations from a book. What are the dimensions?

Thank you for your rapid response. The dimensions are 9 1/2 by 12 1/2. The paper seems to be glossy.