On Republic Day, the Italian President lays a wreath on the monument to the unknown soldier (from World War I), at the Monument to Vittorio Emmanuele II.
What To Know About Celebrating Italy Republic Day

LIVING IN MILAN
Festa della Repubblica, aka Republic Day is one of the national symbols of Italy. Similar to Independence Day in the US and other countries, it celebrates the official formation of the Republic of Italy after World War II.
On Republic Day, the Italian President lays a wreath on the monument to the unknown soldier (from World War I), at the Monument to Vittorio Emmanuele II.