San Xavier Mission's west chapel contains a glass box with a statue in it. Photo by Jim Davis, Arizona Daily Star 1992.
Inside the church, many visitors see the reclining statue in the glass case in the west transept, and think it's a mummy of some kind. The real story is even better. It's a statue of the crucified Christ, and was originally at Tumacacori Mission (now Tumacacori National Historical Park, partway to Nogales).
When that community was abandoned in 1849 due to Apache raiding, the people moved to San Xavier, bringing their saints with them. Along the way, the statue of Christ lost its legs. By the 1890s, it was displayed in the west transept as the entombed Christ.
Around the time of War I, the statue was redefined as a reclining St. Francis Xavier, placed in a glass case, and there it remains, the object of considerable popular devotion. - Jim Griffith for the Arizona Daily Star

