I only recently discovered that the exhibition "Galileo. Images of the universe from antiquity to the telescope" in Florence has one room with frescoes from "Pompeii".
The show is really worth to see: The frescoes of Pompeii are meant to illustrate the "strong influence" of De Astronomia by Hyginus in the first century AD and show "personifications of the [most popular stellar] constellations".
"Galileo" opened in March and is still on display at Palazzo Strozzi until the end of August (9-20; Thursday until 23 PM). All texts as well as the catalogue come in Italian and English.
A virtual visit is possible through the website of the "Istituto di storia della scienza": http://brunelleschi.imss.fi.it/galileopalazzostrozzi/index_flash.html
Section III has the frescoes from Pompeii: