Altare della Patria (English: Altar of the Fatherland) is a unique decision for 
Italy. It builds the Vittoriano Monument in Rome.
It can only be seen in the decision tab if Italy is an absolute monarchy. It is possible to take once Italy has researched Realism. It gives 5 prestige and lowers militancy by 1.
The flavour text says:
The Altare della Patria or 'Vittoriano' is a monument in Rome, Italy. enacurated in 1911 in honour of Victor Emmanuel II and build to commemorate the founding of the Italian nation. Let other countries bask in the glory of Rome reborn, worthy of our young nation.