Some highlights reccomended by experts are :
* Accademia di Spagna, a former monastery on the Janiculum Hill that includes a round temple by Donato Bramante, considered to be one of the masterpieces of the High Renaissance.
* Palazzo Borromini - constructed in 1576 and rebuilt in the 17th Century by Baroque master Francesco Borromini.
* Casino Nobile di Villa Torlonia, a villa in Rome’s northeast exhibiting works by famed Venetian sculptor Antonio Canova, his student Rinaldo Rinaldi and Romantic painter Francesco Podesti.
This initiative is also supported by government institutions - you can visit seat of Italian Senate - Palazzo Madama, and home to the President of the Senate’s apartment - palazzo Giustiniani.
Many popular museums are participating, including Galleria Borghese, MACRO and MAXXI, meaning they’re free to enter.
Although www.openhouseroma.org site is only in Italina, open Programma part and find all objects with pictures and opening hours.