"Designed by noted New York architect C. Grant La Farge, the Cathedral has been cited "as [having] one of the most beautiful church interiors of modern times."
After reading that, I knew I had to make the Cathedral a stop during my vacation. We arrived at the Cathedral at approximately 1:00PM and had to wait outside a few minutes for the 12:10 Mass to be completed (I won't take any photos of any service inside of a church, out of respect for those in attendance). Once the Mass was completed, I set up my tripod in the center of the church and took this shot. I have to agree, the interior of the Cathedral is stunning, to say the least.
St. Matthews Cathedral, Washington DC
PS: One interesting bit of history about the Cathedral as well, the funeral service for John F. Kennedy was held in the Cathedral.