Quasimodo attempts to kidnap Esmeralda by order from Frollo.
Quasimodo is flogged, but the actual impact of the flogging isn't shown directly.
A man is told that if he fails a test, he'll be hanged like the dummy he sees. He fails the test, but doesn't get hanged for a reason.
Esmeralda is taken to a torture chamber. If she was actually tortured or not is never confirmed, as long as she has confessed the murder she never did.
Many people try to break into the Cathedral, when Quasimodo drops multiple big blocks and pours some boiling stuff over them.