Feast of the Dedication of the Lateran Cathedral in Rome

More properly called the Patriarchal Basilica of the Most Holy Savior and Saint John the Baptist at the Lateran. You know, the Pope's "home" church. Many people think that that is St Peter's Basilica, but no, it's St John Lateran. St. Peter's is assigned to the Patriarch of Constantinople, for when he's in Rome, if he were to ever reunite with Rome.

So the Churches of Rome:

1. St John Lateran-The Patriarch of the West, aka the Pope
2. St Peter-The Patriarch of Constantinople
3. St Paul-The Patriarch of Alexandria
4. St. Mary Major-The Patriarch of Antioch
5. St. Lawrence Outside the Walls-The Patriarch of Jerusalem

Of course these schisms would have to end, the Patriarch submit to the authority of the Pastor of the Universal Church (aka the Pope) to claim their Patriarchal sees in within Rome.