Sunday, Sixth and Last Week of Lent San Giovanni in Laterno (St. John Lateran)
"The Papal Archbasilica of St. John Lateran (Italian: Arcibasilica Papale di San Giovanni in Laterano) is the cathedral of the Church of Rome, Italy, and the official ecclesiastical seat of the Bishop of Rome, who is the Pope. Officially named Archibasilica Sanctissimi Salvatoris et Sancti Iohannes Baptista et Evangelista in Laterano (English: Archbasilica of the Most Holy Saviour and Sts. John the Baptist and the Evangelist at the Lateran", ), it is the oldest and ranks first (being the cathedral of Rome) among the four Papal Basilicas or major basilicas of Rome, and holds the title of ecumenical mother church (mother church of the whole inhabited world) among Catholics." (Wikipedia)
For a virtual tour, go here! For the complete history of this ancient and important church, go here.