The Girolaminis’ Picture Gallery is housed in part of the Girolamini Oratory, which was built between the 16th and the 17th Century. The picture gallery holds sculptures and church vestments as well as some important religious paintings including works by Guido Reni, Luca Giordano, Ribera and Francesco Solimena. There is an 18th Century library with valuable incunabula and manuscripts among which is one once belonging to the Neapolitan philosopher Giuseppe Valletta. Admission is free and guided tours are available.