Temple of literature also has a entrance fee, well last time i went some time ago.
The smaller Pagodas/Temples you may come across while walking around, usually have a collection box, just stuff what you think in there.
answered about 5 months ago by hangvp
well, temple of literature: 5000vnd, Ngoc Son temple: 3000vnd, Quan Thanh temple near westlake: 2000vnd, and for the other pagodas/ buddhist temples you dont need to pay :)