Wikipedia’s architecture notes:
Outside, San Xavier has a white, Moorish-inspired design, elegant and simple, with an ornately decorated entrance. No records of the architect, builders, craftsmen and artisans responsible for creating and decorating it are known. Most of the labor was provided by the local Indians, and many believe they provided most or all of the artisans as well. Visitors entering the massive, carved mesquite-wood doors of San Xavier are often struck by the coolness of the interior, and the dazzling colors of the paintings, carvings, frescoes and statues. The interior is richly decorated with ornaments showing a mixture of New Spain and Native American artistic motifs.
The floor plan of the church resembles the classic Latin Cross. The main aisle is separated from the sanctuary by the transept or cross aisle, with chapels at either end. The dome above the transept is 52 feet (16 m) high supported by arches and squinches.
Featured Comment by Laura: “My grandmother Dorothy, who lived near Tucson for many years, was a devout Catholic, had her children educated by the Jesuits, and especially loved San Xavier. After she died, I made a pilgrimage and fell in love myself. She would have so enjoyed these photos! I especially like your St. Francis statue picture. Also, the word “squinches.”
Nathan replies: Yes, squinches. This was a new word for me. All I could think of to relate them to were the flying buttresses used in Gothic cathedrals, but apparently they serve a different function.