All state museums and monuments and most of those owned by the city hall will be free this week end in Rome :-). Saturday 24 and Sunday 25 are the European Heritage Days, the yearly initiative which sees citizens in 50 European countries celebrate the old continent’s cultural heritage with new cultural assets on view and the opening up of historical buildings normally closed to the public.
Here is a list of state museums and monuments in Rome and surroundings with opening hours and free guided tours and events can be found here after page 10.
With regards to the city-owned landmarks here is the link to to what is open for free. Pay attention, because there is a difference between what Romans and non-Romans can see for free, with the latter having free admission to a more limited amount of sites.
On September 25 the Vatican Museums will also be free, like every final Sunday of the month. The Italian President’s palace, the Quirinale, will be open for free from 8:30am to 12pm, too.
And Rome’s City Government building, Palazzo Senatorio, on top of Campidoglio, will be open for free guided tours from 9am until midnight on Saturday.
Hope you can enjoy many free and inspiring visits!