What are relief prints generally made from?

So what I understand is a printing brick that you carve into

Explanation:

Don't take my word for it I tried okay

Relief prints are most commonly made from wood with a carving the artist makes themselves.

Explanation:

giovanni battista pergolesi, italian baroque composer who wrote one of the most famous settings of the stabat mater. don lorenzo perosi, catholic priest and director of the sistine choir under five popes.