The basilica is enormous and has five major domes over the nave along with several minor ones on the sides. This image, taken towards the back of the church (but not quite all the way back as the aisle is longer than it appears here), shows parts of all five major domes.

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We met up with fellow Pbaser Long Bach Nguyen and his wife Katherine at this beautiful basilica, which although located fairly close to our house, we hadn’t visited since 2008. A lot of finishing touches have been made since then, and it was nice to see it in its completed state as well as to meet Long and Katherine.

The Basilica of the National Shrine of the Immaculate Conception is the largest Catholic church in the United States and in North America and the tallest habitable building in Washington, D.C. The foundation stone was laid in 1920, and the mosaic adornment of final dome was completed in 2017.

Best to view in "Original" because other versions resized by Pbase are decidedly unsharp.

Photographer at work, posted earlier: