Close-up view of a decorative grille inside the St. Paul Cathedral. Photographed by Paul Nelson on July 10, 2014.

Decorative altar ceiling inside the St. Paul Cathedral. Photographed by Paul Nelson on July 10, 2014.

Relief statue of St. Paul carved by Leon Hermant for the exterior of the Cathedral of St. Paul. Photographed by Paul Nelson on July 10, 2014.

West-facing view of the main seating area of the Cathedral of St. Paul. Photographed by Paul Nelson on July 10, 2014.

Stained glass window depicting Saint Wenceslaus inside the Cathedral of St. Paul’s shrine of nations. Photographed by Paul Nelson on July 16, 2014.

Close-up view of Tinos marble from Greece inside the north vestibule of the Cathedral of St. Paul. Photographed by Paul Nelson on July 16, 2014.

The Cathedral of St. Paul’s St. Peter chapel. Photographed by Paul Nelson on July 16, 2014.

The fourth Cathedral of St. Paul, c.1956.

The third Cathedral of St. Paul, 1914. Photograph by Charles D. Lundin.

Oil-on-canvas painting of the Chapel of St. Paul by Alexis Jean Fournier, 1888.