Where are the enzymes that break down proteins?

It seems to be a well-known truth that proteins in the human body are decomposed by acting on them with specific proteolytic enzymes. The mechanism of action is the destruction of peptide bonds by such enzymes. In accordance with what has already been said, let’s summarize: similar enzymes are produced in the stomach, several types of proteases in the small intestine and pancreas.
Means: gastric juice, pancreatic juice, intestinal juice.