The Loretto Chapel in Santa Fé, New Mexico is famous for its "miraculous staircase" that was constructed mysteriously in the 19th century. The nuns prayed to St. Joseph for help building a staircase and a man arrived claiming to be a carpenter. He built the impossible spiral staircase without nails or a central support in just 9 days then disappeared. Engineers still cannot explain how the staircase remains standing without support. The wood used is also not native to the region, adding to the mystery of how it was constructed. The staircase has 33 steps, matching the age of Jesus at his death, strengthening the belief it was a miracle.