The current church building is a striking masterpiece of Spanish Colonial architecture and was completed in 1797.
To give you an idea of what has been done to restore the exterior, take a peek at this shot from the mission museum that shows the structure in the late 19th century.
Now each an every detail beckons the amateur photographer.
As well as the sweeping scroll curves that help anchor the towers,
The West Transcept focuses on the recumbent statue of San Francisco Xavier. Pilgrims form a steady line to touch the vestments and literally move the segmented head of the saint as they pray for favors.
This bier is actually taken out of the church and carried at certain festivals during the year. See the photos below from the Museum.