Naples National Archaeological Museum
In 1819, when King Francis I of Naples visited the Pompeii exhibition at the Naples National Archaeological Museum with his wife and daughter, he was embarrassed by the erotic artwork and ordered it to be locked away in a "secret cabinet", accessible only to "people of mature age and respected morals". Re-opened, closed, re-opened again and then closed again for nearly 100 years, the Secret Museum, Naples was briefly made accessible at the end of the 1960s (the time of the sexual revolution) and was finally re-opened for viewing in 2000. Minors are still only allowed entry to the once-secret cabinet in the presence of a guardian, or with written permission.