Palazzo Manganelli is a large noble palace on Via dei Bianchi, north-east of the cathedral, still in private hands but visitable on prior booking. The eighteenth-century interiors are some of the best preserved in the city, with original frescoes, Murano chandeliers, and an internal garden that is one of the most atmospheric private spaces in Catania.
The palace is sometimes used for events and small concerts; check the website for openings. It is best as a guided visit.