The Loretto Chapel in Santa Fe, New Mexico, USA is a former Roman Catholic church that is now used as a museum and wedding chapel. It is known for its unusual helix-shaped spiral staircase (the "Miraculous Stair"), the name and origin of the builder has still not been verified. The Sisters of Loretto credit St. Joseph with its construction.
History of the staircase construction
In 1872 Jean-Baptiste Lamy, the Bishop of the Santa Fe Archdiocese, commissioned the building of a convent chapel to be named Our Lady of Light Chapel, which would be in the care of the Sisters of Loretto. The chapel was designed by French architect Antoine Mouly in the Gothic Revival style, complete with spires, buttresses, and stained glass windows imported from France. Although it was built on a much smaller scale, the chapel bears an obvious resemblance to the Sainte-Chapelle in Paris.
The architect died suddenly and it was only after much of the chapel was constructed that the builders realized it was lacking any type of stairway to the choir loft. Due to the chapel's small size, a standard staircase would have been too large. Historians have also noted that earlier churches of the period had ladders rather than stairs to the choir loft, but the Sisters did not feel comfortable with that prospect because of the long habits that they wore.
The Sisters of Loretto relate the story as follows:
Needing a way to get up to the choir loft the nuns prayed for St. Joseph's intercession for nine straight days. On the day after their novena ended a shabby-looking stranger appeared at their door. He told the nuns he would build them a staircase but that he needed total privacy and locked himself in the chapel for three months. He used a small number of primitive tools including a square, a saw and some warm water and constructed a spiral staircase entirely of non-native wood. The identity of the carpenter is not known for as soon as the staircase was finally finished he was gone. Many witnesses, upon seeing the staircase, feel it was constructed by St. Joseph himself, as a miraculous occurrence.
The resulting staircase is an impressive work of carpentry. It ascends twenty feet, making two complete revolutions up to the choir loft without the use of nails or apparent center support. It has been surmised that the central spiral of the staircase is narrow enough to serve as a central beam. Nonetheless there was no attachment unto any wall or pole in the original stairway, although in 1887 -- 10 years after it was built -- a railing was added and the outer spiral was fastened to an adjacent pillar. Instead of metal nails, the staircase was constructed using dowels or wooden pegs.
The staircase has 33 steps, this is the same age of Jesus Christ. The risers of the 33 steps are all of the same height. Made of an apparently extinct wood species, it was constructed with only square wooden pegs without glue or nails. It makes over two complete 360-degree turns, stands 20’ tall and has no center support. 
The legend claims that the mystery had never been satisfactorily solved as to who the carpenter was or where he got his lumber, and that there were no reports of anyone seeing lumber delivered or even seeing the man come and go while the construction was being done. Since he left before the Mother Superior could pay him, the Sisters of Loretto offered a reward for the identity of the man, but it was never claimed.
Hypotheses for the mystery
Johann Hadwiger, a German woodworker, was once credited with the design and construction of the stairs. The source of this claim, Johann's grandson Oscar Hadwiger, later admitted he had no proof.
Until this day no one has yet verified the builder. According to the written account there are many inconsistencies with all of the possible builders including Mr. Rocha.
Loretto Chapel was used on a daily basis by the female students of Loretto Academy as well as by its nuns until the Academy and Chapel closed as Catholic institutions. Born in Santa Fe in 1917 (1917–2005), Mary Frances Hill (née Julian) attended the Loretto Academy from 1920 until 1935 and is considered to have attended the Academy longer than any other student and as having climbed the miraculous staircase more times than anyone else as a result of having been a member of the Academy's choir. In 1968, after the Academy closed, the all-male St. Michael's High School turned co-ed to accommodate the Academy's female students.
The Chapel today
The Loretto Chapel is now primarily a museum but weddings may be arranged in the Chapel, including a highlight of the wedding couple being photographed on the staircase. There is an entrance fee for the chapel. It is owned by a private company. The Church of Antioch at Santa Fe, an inclusive Sacramental Community in the Catholic style, offers Holy Eucharist every Sunday morning at 8:45 am.
In popular culture
The case was investigated and subsequently re-enacted in the Unsolved Mysteries episode "Miracle Staircase".
Singer-songwriter Kate Vargas recorded "Sisters of Loretto" in 2014. 
- Weddings at Loretto Chapel
- History of the Loretto Chapel
- Nickell, Joe (November–December 1998). "Helix to Heaven: The Staircase Stands but the Myth Falls". Skeptical Inquirer 22.6.
- The Staircase (IMDB)
|Wikimedia Commons has media related to Loretto Chapel, Santa Fe.|
- Loretto Chapel home page
- Engineering miracle or just good carpentry?
- Sisters of Loretto song by Kate Vargas