Tha Pantheon is one of the oldest and most intact ancient buildings in Rome. Whenever I walk into the Piazza della Rotondo, it never ceases to amaze me at the sheer thought if its age. The 2,000 year old building now serves as a church, where mass is celebrated each Sunday and bears the name “Santa Maria ad Martyres” (St. Mary and the Martyrs). While the interior of the Pantheon is incredible, I find that the oculus to be the most spectacular piece.
But, what I like most about the structure is a beautiful celebration that occurs each year on Pentecost Sunday. An ancient tradition, said to originate from 609 AD. After the Sunday mass, beautiful red rose petals descend from the oculus to celebrate the descent of the Holy Spirit upon Mary and the Apostles. Pentecost Sunday occurs 50 days after Easter Sunday, so check that calendar and you can enjoy the beauty of this event as well!