Nights of Museums in Palermo
“Night of Museums”: full list of art sites accessible
“Saturday, May 17, throughout the day, the appointment with” The Night of Museums “, the event that will allow anyone to rediscover the art venues of the city.”
from 7pm up to midnight…entrance FREE!
It might be of interest: http://www.palermotoday.it/eventi/notte-musei-programma-sabato-17-maggio-2014.html