From Rare Historical Photos, this 1934 snapshot of the Italian Fascist Party Federation in Rome.

The building in the picture is Palazzo Braschi in Rome, the headquarters of the Fascist Party Federation (the local one, not the national Party headquarters). It was not always covered up like that; this set-up was displayed for the 1934 elections, in which Italians were called to vote either for or against the Fascist representatives list. The "SI SI…" lettering (meaning "Yes Yes…") was propaganda for one of the two plebiscite elections held during the Fascist Regime, where electors didn't vote for individual parties (there wasn't any but the Fascist one), neither for single candidates, but just voted "Yes" or "No" to a single list of candidates presented by the Duce himself.